From this piece in today's Guardian:

"She had done many benefits for the striking miners back in the mid-80s, and loved the story about the pickets who had built a snowman, only to see a police Land Rover deliberately smash into it. "Next day they built another snowman, and exactly the same thing happened. What the police didn't know was they had built this one round a cast- iron bollard."

I think that image sums her up pretty well - cheerful but formidable.