Perhaps unsurprisingly, given recent Govt.s have seldom been really interested in prisons as anything more than punishment or warehousing for criminals, the budget for prison education (a key aspect of any hope fro rehabilitation) has been cut (again) in real terms.
This is doubly disappointing as one might have hoped James Timpson as Prisons Minister might have been able to shift the Govt. towards realising the value of prison education.

Cuts to prison education: Why the UK cannot afford to take this step - Transforming Society
Scott Thomas and Jonathan Glazzard, authors of 'The Queer World of Prison', argue that despite government claims of modest reductions, prison education across England and Wales faces deep cuts—up to 65% in some prisons—threatening rehabilitation, prison safety and efforts to reduce reoffending.