Theresa May will place a triple lock on Brexit in the Tory manifesto to stop obstruction by diehard Remainers.
Tory sources say she is set to include specific pledges to overcome opposition within her party and in the Lords.
The manifesto is expected to commit the Conservatives to ending EU free movement and pulling out of both the single market and European Court of Justice.
Senior Tories see the three measures as essential in delivering last year's referendum result.
Source: Daily Mail