The Conservatives have described their plans to stop British laws being overruled by human rights judgements from Strasbourg as “viable and legal”.
Justice Secretary Chris Grayling said if the Tories won the 2015 election, a new Bill of Rights would give UK courts and Parliament the “final say”.
There should be no “legal blank cheque to take human rights into areas where they have never applied”, he added.
But former Attorney General Dominic Grieve said the plans were flawed.
The Tory MP said they would be “difficult to implement” and risked “undermining” the UK’s – and his own party’s – tradition of upholding human rights.
Labour and the Lib Dems have said the proposals are politically motivated while the UK Independence Party claimed they were “worthless”.
The Conservatives have pledged for a decade to scrap the 1998 Human Rights Act, introduced under the Labour government, which incorporates the European Convention on Human Rights into British law.