THERESA May yesterday launched her first public attack on Boris Johnson since she was ousted - slamming his immigration plans.
Boris plans to introduce an Aussie-style points-based system after Brexit which will let skilled workers in while stopping the flood of unskilled migrants.
But Mrs May warned Bojo’s proposal is open to “abuse” and will not control numbers.
Speaking in the Commons, she warned: “It’s possible that the Home Office’s best brains have come up with a very good scheme.
“But I would simply urge the Home Secretary and the Home Office to look very carefully at the lessons that have been learned in the past in relation to points-based system, which in themselves are not an answer to controlling immigration and can allow abuse to take place.”
The best headlines and the greatest oratory are worth nothing if governments don't actually practically deliver for peopleTheresa May
The former PM also said she is “concerned” about reports the Government is considering allowing different regions in the UK to issue visas to tackle their own skills shortages.
And she also took aim at his tough new law to hand foreign criminals longer prison sentences if they sneak back into the UK.
Mrs May said the plan risks backfiring by stuffing Britain’s bursting prisons with yet more crooks.
She said: “The result of the proposals will be that we will see, potentially, see more foreign national offenders in our prisons.”
Mrs May urged her successor to look instead at “how we can most effectively remove foreign national offenders”.
It is usually the convention or former PMs to refrain from blasting their successors.
But Mrs May used the Queen’s Speech debate to vent her concerns.
It is only the third time she has spoken in the commons since she was forced to quit as PM.