Prison bosses are considering the roll-out of weapons amnesties following the success of an amnesty in Dublin’s Wheatfield Prison.

Bumper sales of cut-price Tayto Cheese & Onion crisps, bottles of Coca Cola, Jelly Tots, and cigarettes helped profits at the prison service’s network of tuck shops jump to €700,000 last year.

Self-harm incidents more than doubled in St Patrick’s Institution for young offenders last year.