I know it's kind of a thing that politicians lie. They are famous for it. But Sunak's lies last night feel especially egregious. They were so blatant, so utterly lacking in subtlety or any of that typical... weaselly "true from a certain point of view" that one expects of politicians' lies, that I'm impressed Starmer held his temper as well as he did.
As for times a UK politician has been publically accused of falsely representing the civil service... Well, the Tories have made a thing of it in the last few years. Not so much specific lies, but a broader general misrepresenting of what the civil service is and does. Every time the Tories don't get to do what they want because it's stupid, badly thought out, impractical, evil, or all four of those things, they blame the civil service for "blocking the will of the people".