When did government stop keeping tally on prisoner compensation?

In a reply to a parliamentary question from Conservative MP Phillip Davies, prisons minister Andrew Selous says the National Offender Management Service (NOMS) no longer keeps track of compensation payments made to prisoners for, among other things, assaults and medical negligence.

Details of such claims were last released to parliament in September 2010 and showed the following prisoner compensation payments between 2004 and 2010:

Medical negligence – £4,225,724 total payments
Assaults by staff – £1,151,866 total payments
Assaults by prisoners – £392,088 total payments
Abuse/harrassment – £9,000 total payments

The 2010 data did not specify which compensation payments were made to individuals imprisoned as children, and which were made to adult prisoners. But a 2014 freedom of information request found a total of £252,370 had been paid to child prisoners across the previous five years.