Bickering between neighbours is as old as time, and the inhabitants of Numbers 10 and 11 Downing Street are no different. The amity that characterised the Cameron-Osborne partnership was very much the exception, not the rule.
The infamous Blair-Brown relationship (aka the TB-GBs) is frequently cited, but that at least lasted a decade and ended with a (largely) peaceful transfer of power. Lawson resigned from Thatcher’s cabinet, Major sacked Lamont, May wanted to fire Hammond and Javid quit after six months.
