Prison Name 
Baseline  In Use CNA Operational  Population * % Pop to    n  % Accommodation  
 I
 
CNA 
Capacity 
Use CNA 
Available 
Altcourse 
794 
794 
1,133 
1,108 
140% 
100% 
Ashfield 
408 
408 
400 
391 
96% 
100% 
Askham Grange 
150 
126 
128 
98 
78% 
84% 
Aylesbury 
410 
410 
444 
394 
96% 
100% 
Bedford 
322 
322 
506 
482 
150% 
100% 
Belmarsh 
781 
781 
930 
884 
113% 
100% 
Birmingham 
1,093 
1,093 
1,450 
1,425 
130% 
100% 
Blantyre House 
122 
0 
0 
0% 
Brinsford 
545 
423 
455 
399 
94% 
78% 
Bristol 
425 
407 
614 
578 
142% 
96% 
Brixton 
530 
530 
810 
795 
150% 
100% 
Bronzefield 
527 
527 
527 
509 
97% 
100% 
Buckley Hall 
409 
409 
455 
445 
109% 
100% 
Bullingdon 
879 
879 
1,114 
1,102 
125% 
100% 
Bure 
611 
611 
651 
642 
105% 
100% 
Cardiff 
539 
539 
820 
795 
147% 
100% 
Channings Wood 
698 
698 
731 
714 
102% 
100% 
Chelmsford 
550 
550 
745 
732 
133% 
100% 
Coldingley 
507 
507 
519 
515 
102% 
100% 
Cookham Wood 
188 
188 
188 
168 
89% 
100% 
Dartmoor 
642 
639 
660 
641 
100% 
100% 
Deerbolt 
513 
453 
453 
434 
96% 
88% 
Doncaster 
738 
738 
1,145 
1,116 
151% 
100% 
Dovegate 
1,064 
1,060 
1,133 
1,103 
104% 
100% 
Downview 
355 
0 
0 
0% 
Drake Hall 
340 
340 
340 
300 
88% 
100% 
Durham 
591 
591 
995 
949 
161% 
100% 
East Sutton Park 
98 
98 
100 
92 
94% 
100% 
Eastwood Park 
410 
315 
363 
326 
103% 
77% 
Elmley (Sheppey) 
943 
901 
1,100 
1,086 
121% 
96% 
Erlestoke 
494 
494 
524 
516 
104% 
100% 
Exeter 
326 
318 
561 
538 
169% 
98% 
Featherstone 
671 
671 
687 
676 
101% 
100% 
Feltham 
762 
650 
650 
552 
85% 
85% 
Ford 
521 
521 
521 
514 
99% 
100% 
Forest Bank 
1,064 
1,064 
1,460 
1,430 
134% 
100% 
Foston Hall 
303 
303 
345 
286 
94% 
100% 
Frankland 
859 
844 
844 
820 
97% 
98% 
Full Sutton 
604 
596 
616 
592 
99% 
99% 
Garth 
811 
738 
773 
733 
99% 
91% 
Gartree 
708 
708 
719 
707 
100% 
100% 
Glen Parva 
637 
589 
728 
535 
91% 
92% 
Grendon / Springhill 
586 
554 
554 
538 
97% 
95% 
Guys Marsh 
518 
518 
579 
549 
106% 
100% 
Hatfield 
266 
266 
266 
250 
94% 
100% 
Haverigg 
622 
622 
644 
625 
100% 
100% 
Hewell 
1,018 
1,018 
1,309 
1,253 
123% 
100% 
High Down 
999 
999 
1,163 
1,138 
114% 
100% 
Highpoint (North and South) 
1,311 
1,311 
1,343 
1,337 
102% 
100% 
 
Prison Name 
Baseline  In Use CNA Operational  Population * % Pop to    n  % Accommodation  
 I
 
CNA 
Capacity 
Use CNA 
Available 
Hindley 
534 
270 
318 
249 
92% 
51% 
Hollesley Bay 
424 
352 
352 
351 
100% 
83% 
Holloway 
540 
533 
591 
527 
99% 
99% 
Holme House 
1,036 
1,036 
1,210 
1,169 
113% 
100% 
Hull 
723 
723 
1,044 
1,024 
142% 
100% 
Humber 
948 
924 
1,062 
1,029 
111% 
97% 
Huntercombe 
370 
307 
430 
419 
136% 
83% 
Isis 
478 
478 
622 
613 
128% 
100% 
Isle of Wight 
1,056 
996 
1,079 
1,070 
107% 
94% 
Kennet 
175 
175 
342 
234 
134% 
100% 
Kirkham 
657 
657 
657 
598 
91% 
100% 
Kirklevington Grange 
283 
283 
283 
279 
99% 
100% 
Lancaster Farms 
495 
495 
549 
543 
110% 
100% 
Leeds 
669 
669 
1,212 
1,207 
180% 
100% 
Leicester 
214 
214 
411 
337 
157% 
100% 
Lewes 
617 
617 
722 
657 
106% 
100% 
Leyhill 
527 
527 
527 
475 
90% 
100% 
Lincoln 
408 
403 
729 
592 
147% 
99% 
Lindholme 
1,048 
924 
1,010 
992 
107% 
88% 
Littlehey 
1,140 
1,139 
1,205 
1,202 
106% 
100% 
Liverpool 
1,173 
1,101 
1,386 
1,160 
105% 
94% 
Long Lartin 
625 
625 
625 
621 
99% 
100% 
Low Newton 
314 
291 
329 
266 
91% 
93% 
Lowdham Grange 
900 
900 
920 
916 
102% 
100% 
Maidstone 
565 
565 
600 
591 
105% 
100% 
Manchester 
965 
965 
1,286 
1,105 
115% 
100% 
Moorland 
943 
943 
1,006 
994 
105% 
100% 
Mount 
898 
898 
932 
882 
98% 
100% 
New Hall 
395 
371 
425 
356 
96% 
94% 
North Sea Camp 
420 
420 
420 
329 
78% 
100% 
Northumberland 
1,348 
1,348 
1,348 
1,312 
97% 
100% 
Norwich 
626 
626 
769 
763 
122% 
100% 
Nottingham 
723 
723 
1,060 
1,043 
144% 
100% 
Oakwood 
1,605 
1,605 
1,605 
1,588 
99% 
100% 
Onley 
742 
742 
747 
739 
100% 
100% 
Parc 
1,222 
1,222 
1,526 
1,512 
124% 
100% 
Pentonville 
915 
915 
1,316 
1,311 
143% 
100% 
Peterborough (Male & Female) 
1,132 
1,119 
1,252 
1,191 
106% 
99% 
Portland 
464 
464 
531 
525 
113% 
100% 
Preston 
456 
433 
796 
676 
156% 
95% 
Ranby 
893 
892 
1,098 
1,089 
122% 
100% 
Risley 
1,050 
1,050 
1,115 
1,105 
105% 
100% 
Rochester 
802 
742 
750 
721 
97% 
93% 
Rye Hill 
600 
600 
625 
622 
104% 
100% 
Send 
282 
282 
282 
275 
98% 
100% 
Stafford 
741 
741 
741 
736 
99% 
100% 
Standford Hill (Sheppey) 
464 
464 
464 
455 
98% 
100% 
Stocken 
768 
768 
843 
837 
109% 
100% 
Stoke Heath 
662 
662 
782 
728 
110% 
100% 
Styal 
479 
470 
485 
481 
102% 
98% 
Sudbury 
581 
581 
581 
444 
76% 
100% 
Swaleside (Sheppey) 
1,112 
1,112 
1,112 
1,091 
98% 
100% 
Swansea 
250 
242 
455 
428 
177% 
97% 
Swinfen Hall 
604 
544 
594 
565 
104% 
90% 
 
Prison Name 
Baseline  In Use CNA Operational  Population * % Pop to    n  % Accommodation  
 I
 
CNA 
Capacity 
Use CNA 
Available 
Thameside 
600 
600 
900 
889 
148% 
100% 
Thorn Cross 
331 
331 
345 
332 
100% 
100% 
Usk / Prescoed 
378 
378 
503 
500 
132% 
100% 
Wakefield 
751 
730 
730 
730 
100% 
97% 
Wandsworth 
963 
943 
1,658 
1,634 
173% 
98% 
Warren Hill 
257 
212 
212 
124 
58% 
82% 
Wayland 
957 
908 
988 
973 
107% 
95% 
Wealstun 
810 
801 
824 
818 
102% 
99% 
Werrington 
160 
160 
160 
119 
74% 
100% 
Wetherby 
396 
336 
336 
295 
88% 
85% 
Whatton 
775 
769 
841 
837 
109% 
99% 
Whitemoor 
473 
458 
458 
447 
98% 
97% 
Winchester 
469 
469 
690 
678 
145% 
100% 
Woodhill 
660 
568 
727 
723 
127% 
86% 
Wormwood Scrubs 
1,156 
1,156 
1,279 
1,268 
110% 
100% 
Wymott 
1,102 
1,102 
1,143 
1,121 
102% 
100% 
Sub total 
77,561 
75,190 
88,150 
84,324 
112% 
97% 
NOMS Operated Immigration Removal Centres (IRCs) 
Dover (IRC) 
401 
401 
401 
385 
96% 
100% 
Haslar (IRC) 
197 
197 
197 
183 
93% 
100% 
Morton Hall (IRC) 
392 
392 
392 
229 
58% 
100% 
Verne (IRC) 
570 
570 
580 
560 
98% 
100% 
Sub total 
1,560 
1,560 
1,570 
1,357 
87% 
100% 
Total 
79,121 
76,750 
87,720 
** 
85,681 
112% 
97% 

Report produced by Population Strategy. The CNA and Operational Capacity figures are taken from the latest signed cell certificates held by PS. 

 
*The prison unlock figure may be lower than the 'Population', as the 'Population' includes prisoners on authorised absence. 

 
** Useable Operational Capacity of the estate is the sum of all establishments' operational capacity less 2000 places. 

 
The report is compiled from data on the last working Friday in March 2015 
 
. 

Definitions of Accommodation Terms Certified Normal Accommodation (CNA) 
 
Certified Normal Accommodation (CNA), or uncrowded capacity, is the Prison Service's own measure of accommodation.  CNA represents the good, decent standard of accommodation that the Service aspires to provide all prisoners. 

 
Baseline CNA 
 
Baseline CNA is the sum total of all certified accommodation in an establishment except, normally: •Cells in punishment or segregation units. •Healthcare cells or rooms in training prisons and YOIs that are not routinely used to accommodate long stay patients. 

 
In-Use CNA 
 
In-use CNA is baseline CNA less those places not available for immediate use, for example: damaged cells, cells affected by building works. 

 
Operational Capacity 
 
The operational capacity of a prison is the total number of prisoners that an establishment can hold taking into account control, security and the proper operation of the planned regime. It is determined by the Deputy Director of Custody on the basis of operational judgement and experience. 

 
Useable Operational Capacity 
 
Useable Operational Capacity of the estate is the sum of all establishments' operational capacity less 2000 places. This is known as the operating margin and reflects the constraints imposed by the need to provide separate accommodation for different classes of prisoner i.e. by sex, age, security category, conviction status, single cell risk assessment and also due to geographical distribution. 

 
Establishments Exceeding their Operational Capacity Governing governors and Controllers and Directors of contracted out prisons must ensure that the approved operational capacity is not normally exceeded other than on an exceptional basis to accommodate pressing operational need.