But, while English magistrates' courts reduced the proportion of custodial sentences in that period, from 4.9% to 3.8%, Welsh courts showed a slight increase, from 4% to 4.3%.

BBC: Prison sentence 'disparity' warning

He said the protest led to courts in Cardiff, and later around Wales, issuing summons' in Welsh on demand.

BBC: Library's historic protest appeal

Powers over criminal justice would include the courts prisons and probation, as well as the establishment of a separate Welsh legal jurisdiction.

BBC: Wales politics