Former UK PM (8)
(Other definitions for blair that I've seen before include "Major's successor as PM" , "Labour leader from 1994" , "Tony ..., modern P.M." , "Real surname of George Orwell" , "Tony . . . . ., British ex-PM" .)
(Other definitions for thatcher that I've seen before include "Former leader" , "Roof-working prime minister" , "man on roof" , "1 16 as 6, she said" , "Margaret, ex-prime minister, or a traditional roofer" .)