Billy Bragg on access to books and guitars in prisons
9 April 2014 Last updated at 14:28 BST
Billy Bragg, who is part of an initiative that has donated more than 350 guitars to prisons, said Chris Grayling's new rules threaten to undermine his charity's work.
The musician told the BBC that they meant prisoners would no longer be able to access steel-string guitars in their cells.
And he said the tightening of rules on parcels that prisoners receive would effectively prevent them from receiving books sent by family and friends.
Mr Bragg asked what people want from prisons, with a choice of "one that rehabilitates prisoners, or one that leaves them to rot".
The full sequence, with the debate that followed this personal film for the Daily Politics will be on iPlayer for seven days from transmission.