"The lady's not for turning" was a phrase used by Margaret Thatcher, then Prime Minister, in her speech to the Conservative Party Conference on 10 October 1980. The term has thus been applied as a name to the speech in its entirety. It is considered a defining speech in Thatcher's political development, becoming something of a Thatcherite motto.
The phrase made reference to Thatcher's refusal to perform a "U-turn" in response to opposition to her liberalisation of the economy, which some commentators as well as her predecessor as Conservative leader (Ted Heath) had urged, mainly because unemployment had risen to 2 million by the autumn of 1980 from 1.5 million the previous year and the economy was in recession, exceeding 3 million by the time the recession ended in 1982.
https://en.wikipedia.org/wiki/The_la...ot_for_turning