Posted on May 9, 2019
In a letter to the PM, the Plymouth MP said he would only vote with the Conservatives on Brexit legislation.
He called on Mrs May to end the “abhorrent process” of “elderly veterans being dragged back to Northern Ireland” to face possible prosecution.
He has previously called for legislation to stop this happening.
Communities Secretary – and former Northern Ireland Secretary – James Brokenshire said he was “very saddened” by Mr Mercer’s announcement and acknowledged that “the system isn’t working well in Northern Ireland”.
He said the government had been consulting on changing the existing system.
Speaking to BBC Radio 4’s Today programme, Mr Mercer said the government had “singularly failed to act for four years and I am simply not prepare to put up with it any more”.
“There is nothing loyal about watching the car go over the cliff and not doing anything about it,” he added.
In his letter the former Army officer and member of the Commons Defence Committee, said: “As you know, the historical prosecution of our servicemen and women is a matter that is personally offensive to me.
“Many are my friends; and I am from their tribe.”