Question to the Ministry of Justice:

To ask the Secretary of State for Justice, what proportion of offenders on the (a) secure estate and (b) young offenders institute estate were unlocked for (i) less than two hours, (ii) more than two hours and (iii) more than eight hours in each of the last 10 financial years.

As we do not hold sufficient data to undertake the necessary calculations, it is not possible to provide the requested information.