There are eight prisons in seven London boroughs. The total numbers of prisoners and the numbers originating from each of these boroughs on 19 September 2007 are shown in the table as follows.
London boroughs with prison capacity Total prison population in borough Prison population originating from borough Greenwich 917 95 Hammersmith and Fulham 1,258 113 Hounslow 607 28 Islington 1,635 50 Kingston upon Thames 190 Less than 10 Lambeth 807 73 Wandsworth 1,484 137
These figures have been drawn from administrative IT systems. Although care is taken when processing and analysing the returns, the detail collected is subject to the inaccuracies inherent in any large scale recording system.