THE “tin-eared arrogance” of the Prime Minister was slammed by Labour today after Boris Johnson revealed his plans to remain in office into the 2030s.  

Mr Johnson said during a trip to Rwanda this weekend that he is “thinking actively” about fighting the next two general elections to become the longest-serving post-war leader.

Labour’s intervention comes as pressure mounts on the PM from across the political divide following the Tories’ humiliating by-election defeats in Wakefield and Tiverton and Honiton.

At the G7 summit in Germany on Sunday, the PM said: “The golden rule is to focus on what we are doing — to address the cost of living, the massive plan for a stronger economy.”

But his ambitions were ridiculed by his own backbenchers and the opposition.

One ex-cabinet minister described Mr Johnson’s remarks as “completely delusional.”

Another senior Tory from a “red wall” seat said Mr Johnson was “showing increasing signs of a bunker mentality and that never ends well.”

A party grandee said that if Mr Johnson “did not heed the lessons of Tiverton & Honiton and Wakefield and take the appropriate action, then his parliamentary colleagues will have to do it for him.”

Labour MP John McDonnell said: “If ever there was a need for a good example to explain the concept of hubris, here it is.

“The tin-eared arrogance of Johnson will hopefully soon be his downfall.”

Green Party MP Caroline Lucas said the PM’s remarks turned “arrogance and complacency into a new art form — an object lesson in utter self-delusion.”

The Sunday Times is reporting that several dozen Tories have submitted new letters to the Tory backbench 1922 Committee demanding another vote of no-confidence in Mr Johnson.

There are also reports that at least half a dozen Tories are considering defecting to Labour.