The available data are given in the table.
Police force 30 September 2004 30 September 2005 30 September 2006 Avon and Somerset 82 146 182 Bedfordshire 26 43 47 Cambridgeshire 56 92 125 Cheshire 47 77 77 Cleveland 75 86 111 Cumbria 6 19 27 Derbyshire 0 43 56 Devon and Cornwall 57 75 158 Dorset 22 56 72 Durham 36 72 90 Essex 80 193 296 Gloucestershire 49 62 94 Greater Manchester 198 264 321 Hampshire 0 23 103 Hertfordshire 75 135 165 Humberside 0 20 112 Kent 58 103 100 Lancashire 115 159 224 Leicestershire 54 119 155 Lincolnshire 46 78 134 London, City of 0 14 8 Merseyside 90 161 214 Metropolitan Police 1,810 2,053 2,681 Norfolk 55 67 102 Northamptonshire 27 38 62 Northumbria 51 143 164 North Yorkshire 46 69 85 Nottinghamshire 69 112 155 South Yorkshire 57 125 126 Staffordshire 13 62 103 Suffolk 15 33 46 Surrey 77 102 161 Sussex 183 231 274 Thames Valley 7 109 134 Warwickshire 43 56 61 West Mercia 67 86 170 West Midlands 40 247 348 West Yorkshire 264 433 505 Wiltshire 28 38 85 Dyfed-Powys 4 24 30 Gwent 26 81 97 North Wales 5 61 76 South Wales 65 116 181 Total England and Wales 4,125 6,323 8,517 1 This table contains full-time equivalent figures that have been rounded to the nearest whole number. Because of rounding, there may be an apparent discrepancy between totals and the sums of the constituent items. 2 Full-time equivalent includes those on career breaks or maternity/paternity leave.