The workers are also opposed to planned changes to the UK's network of 373 Crown - or main - post offices.

BBC: Post office counter staff vote to strike

Two Crown Post Offices in north east Wales - Rhyl and Holywell - are also included in the proposal.

BBC: Crown Post Office workers strike over franchise plans

Appearing via videolink from Liverpool Crown Court, he told the hearing he suffered from post-traumatic stress and depression.

BBC: James Bulger father's statement at Venables hearing

Crown offices are Post Office branches directly managed by the company - as opposed to locally-run by sub-post offices - mainly based in major High Streets.

BBC: Post Office staff go on strike at Crown offices

Four thousand staff working at 373 Crown - or main - offices, handling 20% of all Post Office business, will strike on 30 March.

BBC: Post Office workers set to strike over Easter