§ Mr. McWalterTo ask the Secretary of State for the Home Department what was the average weekly number of hours spent in constructive activity by(a) all prisoners, (b) remand prisoners and (c) sentenced prisoners in (i) 1995–96, (ii) 1996–97 and (iii) each month since April 1997 (1) nationally and (2) in each London prison. [11950]