Boris Johnson and the Conservatives are heading for a majority of 68 seats, according to YouGov’s much-hyped MRP model. This is in line with the polls which, despite signs of a Labour bounce, gave the Conservatives an average 10-point lead last week.

If the numbers are correct, Boris Johnson’s premiership will soon be transformed from a footnote in the history books into a full chapter. And we shall all have an opportunity to see whether “Johnsonism” really exists; whether underneath an instinctive liberal-conservative pragmatism lies a more fully formed, coherent creed.

This is all the more intriguing given that the electoral territory Johnson will inherit looks different from that of almost all his predecessors. The MRP model estimates that the Tories will take more than