PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Collingbourne Road, LONDON, W12 0JG
Introduction
Energy Performance Certificates (EPCs) are designed to tell you how efficient a building is and provides a rating between A (very efficient) and G which is inefficient. It helps to identify how costly it will be to light and heat a property and what the carbon dioxide emissions are likely to be.
An EPC needs to be provided as part of the process of selling or renting a house and should be availale as soon as the property is marketed. An EPC may only be produced by an approved domestic energy assessor and each certificate is valid for 10 years.
Additionally, an EPC will highlight potential efficiency improvements that could be made to the property, an estimated cost for implementation and the likely savings that can be made as a result. These costs and savings are for a typical household in that property and not specific to you or your family.
Certificates issued for Collingbourne Road, W12 0JG are shown below and the data are updated monthly for England and Wales and quarterly for properties in Scotland.
Data are provided by the Department for Levelling Up, Housing and Communities.
Energy Performance Certificates Generated for Collingbourne Road, LONDON, W12 0JG
Period Covered:
2008 - 31 January 2025
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
1 Collingbourne Road
Date
15 Jul 2019
Current
Potential
66
77
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
15 Jul 2019
66
77
Total Floor Area
69 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
11 Collingbourne Road
Date
12 Dec 2019
Current
Potential
70
77
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
12 Dec 2019
70
77
Total Floor Area
69 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
13 Collingbourne Road
Date
25 Aug 2021
Current
Potential
72
79
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
25 Aug 2021
72
79
Total Floor Area
71 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
32
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
13a Collingbourne Road
Date
20 Apr 2023
Current
Potential
60
73
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
20 Apr 2023
60
73
20 Apr 2023
57
73
Total Floor Area
98 sq m
Current CO2 Emissions Level
4.5
Potential CO2 Emissions Level
2.8
CO2 per sq m per Year
46
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
15 COLLINGBOURNE ROAD
Date
2 Sep 2021
Current
Potential
68
77
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
2 Sep 2021
68
77
Total Floor Area
60 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
15 Collingbourne Road
Date
5 Jun 2011
Current
Potential
61
66
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
5 Jun 2011
61
66
1 Jul 2009
65
72
Total Floor Area
67 sq m
Current CO2 Emissions Level
3.5
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
51
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
15a Collingbourne Road
Date
27 Jul 2010
Current
Potential
54
65
Property Type
Maisonette
Built Form
Enclosed Mid-Terrace
Constructed
before 1900
Certificate History
27 Jul 2010
54
65
Total Floor Area
79 sq m
Current CO2 Emissions Level
6.2
Potential CO2 Emissions Level
4.7
CO2 per sq m per Year
58
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
15A COLLINGBOURNE ROAD, LONDON
Date
26 Oct 2020
Current
Potential
58
73
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
26 Oct 2020
58
73
Total Floor Area
108 sq m
Current CO2 Emissions Level
5.1
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
47
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
17 Collingbourne Road
Date
16 Sep 2014
Current
Potential
67
76
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
16 Sep 2014
67
76
Total Floor Area
71 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
17a Collingbourne Road
Date
3 Feb 2012
Current
Potential
52
59
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
3 Feb 2012
52
59
5 May 2009
66
74
Total Floor Area
74 sq m
Current CO2 Emissions Level
6.2
Potential CO2 Emissions Level
5.3
CO2 per sq m per Year
58
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
19 Collingbourne Road
Date
5 Aug 2015
Current
Potential
72
78
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
5 Aug 2015
72
78
6 Jul 2010
11
11
Total Floor Area
81 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
30
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
2
Address
19a Collingbourne Road
Date
29 Oct 2015
Current
Potential
78
78
Property Type
Flat
Built Form
Enclosed Mid-Terrace
Constructed
N/A
Certificate History
29 Oct 2015
78
78
5 Aug 2015
75
79
30 Jun 2012
70
81
Total Floor Area
77 sq m
Current CO2 Emissions Level
1.7
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
22
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
19b Collingbourne Road
Date
22 Jul 2015
Current
Potential
77
77
Property Type
Flat
Built Form
Enclosed Mid-Terrace
Constructed
N/A
Certificate History
22 Jul 2015
77
77
Total Floor Area
36 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
27
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
21 Collingbourne Road
Date
16 Nov 2018
Current
Potential
72
79
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
16 Nov 2018
72
79
Total Floor Area
57 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
21a Collingbourne Road
Date
7 Nov 2018
Current
Potential
79
80
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
7 Nov 2018
79
80
Total Floor Area
86 sq m
Current CO2 Emissions Level
1.8
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
20
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
23 Collingbourne Road
Date
9 Dec 2009
Current
Potential
59
68
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
9 Dec 2009
59
68
Total Floor Area
66 sq m
Current CO2 Emissions Level
3.9
Potential CO2 Emissions Level
3.1
CO2 per sq m per Year
59
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
23a Collingbourne Road
Date
14 Mar 2024
Current
Potential
71
77
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
14 Mar 2024
71
77
16 Apr 2014
71
78
Total Floor Area
75 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
25 Collingbourne Road
Date
22 Jun 2011
Current
Potential
62
68
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
22 Jun 2011
62
68
Total Floor Area
64 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
2.6
CO2 per sq m per Year
51
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
25a Collingbourne Road
Date
29 Nov 2017
Current
Potential
59
68
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
29 Nov 2017
59
68
Total Floor Area
75 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
2.8
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
27 Collingbourne Road
Date
29 Mar 2023
Current
Potential
64
78
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
29 Mar 2023
64
78
22 May 2012
66
80
Total Floor Area
75 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
27a Collingbourne Road
Date
24 Jan 2023
Current
Potential
69
78
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
24 Jan 2023
69
78
16 Dec 2011
61
72
Total Floor Area
109 sq m
Current CO2 Emissions Level
3.6
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
2
Address
29a Collingbourne Road
Date
11 May 2016
Current
Potential
59
66
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
11 May 2016
59
66
Total Floor Area
75 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
3 Collingbourne Road
Date
21 Jan 2019
Current
Potential
57
78
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
21 Jan 2019
57
78
9 Mar 2009
60
71
Total Floor Area
70 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
53
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
31 Collingbourne Road
Date
25 Jun 2011
Current
Potential
62
64
Property Type
Flat
Built Form
N/A
Constructed
1900-1929
Certificate History
25 Jun 2011
62
64
Total Floor Area
69 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
3.2
CO2 per sq m per Year
49
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
31a Collingbourne Road
Date
3 Oct 2008
Current
Potential
63
66
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
3 Oct 2008
63
66
Total Floor Area
136 sq m
Current CO2 Emissions Level
5.6
Potential CO2 Emissions Level
5.4
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
33 Collingbourne Road
Date
1 Jul 2020
Current
Potential
62
75
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
1 Jul 2020
62
75
23 Jun 2009
60
69
Total Floor Area
67 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
33A COLLINGBOURNE ROAD
Date
5 Jul 2021
Current
Potential
65
75
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
5 Jul 2021
65
75
Total Floor Area
97 sq m
Current CO2 Emissions Level
3.8
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
33a Collingbourne Road
Date
7 Sep 2010
Current
Potential
54
63
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
7 Sep 2010
54
63
Total Floor Area
107 sq m
Current CO2 Emissions Level
6.0
Potential CO2 Emissions Level
5.0
CO2 per sq m per Year
56
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
35 Collingbourne Road
Date
27 Jul 2009
Current
Potential
63
69
Property Type
Flat
Built Form
Detached
Constructed
1900-1929
Certificate History
27 Jul 2009
63
69
Total Floor Area
63 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
53
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
35a Collingbourne Road
Date
28 Jan 2022
Current
Potential
60
73
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
28 Jan 2022
60
73
28 Nov 2015
58
62
Total Floor Area
100 sq m
Current CO2 Emissions Level
4.6
Potential CO2 Emissions Level
2.8
CO2 per sq m per Year
46
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
37 Collingbourne Road
Date
15 Sep 2022
Current
Potential
69
79
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
15 Sep 2022
69
79
Total Floor Area
66 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
39 Collingbourne Road
Date
8 Aug 2018
Current
Potential
73
77
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
8 Aug 2018
73
77
Total Floor Area
74 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
30
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
39a Collingbourne Road
Date
8 Aug 2018
Current
Potential
57
77
Property Type
Flat
Built Form
Enclosed Mid-Terrace
Constructed
1976-1982
Certificate History
8 Aug 2018
57
77
Total Floor Area
32 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
78
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
39b Collingbourne Road
Date
8 Aug 2018
Current
Potential
72
78
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
8 Aug 2018
72
78
Total Floor Area
66 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
32
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
3a Collingbourne Road
Date
9 Sep 2018
Current
Potential
54
71
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
9 Sep 2018
54
71
Total Floor Area
112 sq m
Current CO2 Emissions Level
5.8
Potential CO2 Emissions Level
3.3
CO2 per sq m per Year
52
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
41 Collingbourne Road
Date
22 Jul 2020
Current
Potential
67
79
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
22 Jul 2020
67
79
Total Floor Area
68 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
41a Collingbourne Road
Date
16 Nov 2018
Current
Potential
55
72
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
16 Nov 2018
55
72
Total Floor Area
75 sq m
Current CO2 Emissions Level
4.2
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
56
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
43 Collingbourne Road
Date
8 Jan 2019
Current
Potential
77
78
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
8 Jan 2019
77
78
16 Jun 2012
63
75
2 Apr 2010
62
70
Total Floor Area
84 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
23
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
43a Collingbourne Road
Date
21 Nov 2017
Current
Potential
80
80
Property Type
Flat
Built Form
Semi-Detached
Constructed
N/A
Certificate History
21 Nov 2017
80
80
Total Floor Area
33 sq m
Current CO2 Emissions Level
0.8
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
23
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
43b Collingbourne Road
Date
17 Jan 2018
Current
Potential
74
76
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
17 Jan 2018
74
76
Total Floor Area
72 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
28
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
45 COLLINGBOURNE ROAD
Date
21 Sep 2020
Current
Potential
68
78
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
21 Sep 2020
68
78
Total Floor Area
70 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
45 Collingbourne Road
Date
11 Aug 2009
Current
Potential
64
69
Property Type
Flat
Built Form
Semi-Detached
Constructed
1900-1929
Certificate History
11 Aug 2009
64
69
Total Floor Area
65 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
53
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
45a Collingbourne Road
Date
9 Feb 2022
Current
Potential
68
76
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
9 Feb 2022
68
76
12 Apr 2018
47
67
Total Floor Area
99 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
2
Address
47 Collingbourne Road
Date
25 Jun 2023
Current
Potential
64
76
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
25 Jun 2023
64
76
Total Floor Area
66 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
47a Collingbourne Road
Date
6 Nov 2024
Current
Potential
63
72
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
6 Nov 2024
63
72
Total Floor Area
71 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
2.2
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
5 Collingbourne Road
Date
27 Mar 2009
Current
Potential
67
68
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
27 Mar 2009
67
68
Total Floor Area
68 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
3.1
CO2 per sq m per Year
47
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
5a Collingbourne Road
Date
22 Jul 2013
Current
Potential
48
78
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
22 Jul 2013
48
78
Total Floor Area
72 sq m
Current CO2 Emissions Level
4.8
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
67
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
7 COLLINGBOURNE ROAD
Date
2 Aug 2021
Current
Potential
68
77
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
2 Aug 2021
68
77
Total Floor Area
67 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
7a Collingbourne Road
Date
27 Jul 2022
Current
Potential
58
72
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
27 Jul 2022
58
72
19 Feb 2010
63
68
Total Floor Area
98 sq m
Current CO2 Emissions Level
4.8
Potential CO2 Emissions Level
2.8
CO2 per sq m per Year
49
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
9a Collingbourne Road
Date
27 Jun 2019
Current
Potential
61
71
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
27 Jun 2019
61
71
6 Apr 2009
58
64
Total Floor Area
108 sq m
Current CO2 Emissions Level
4.6
Potential CO2 Emissions Level
3.3
CO2 per sq m per Year
42
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Bands
Energy Performance Certificate Notes
There are a number of reasons that certificates are excluded from the dataset;
- The holder of the energy certificate has 'opted-out' of disclosure
- The certificate is excluded on the grounds of national security
- Certificates that are marked as 'cancelled' or 'not for issue'
Certificates are grouped together by the property reference identifier rather than the postal address with a view to showing the history of changes made to properties over time. Sometimes, one property may exist as multiple entries in the table instead and this is as a result of inconsistent building references being used on each prepared certificate.
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