Seems British PM tenures could be effectively stated using a unit derived from lowest common denominator, so recent tenures are :
Keir Starmer: 15 Trusses
Rishi Sunak: 13 Trusses
Liz Truss: 1 Truss
Boris Johnson: 23 Tr
Theresa May: 23 Tr
David Cameron: 46 Tr
Gordon Brown: 21 Tr
Tony Blair: 76 Tr
John Major: 48 Tr
(Using @urlyman's lettuce-head data )


