This anecdote from Simon Heffer is worth recounting in full:-
It was a Labour Party conference in Brighton a few years ago. It was pouring with rain. I was leaving a restaurant and asked for my coat and umbrella.
The latter was a shockingly expensive, black wooden-handled model, bought deliberately so I would remember not to lose it. Instead, I was given the sort of floral collapsible one sold by Italian street vendors for a quid. I then saw a woman leaving the same restaurant with my umbrella. She protested it was hers. I protested it wasn’t.
I pointed out that a brass collar on the shaft bore my initials. At that moment, a waiter said, “Madam, here is your umbrella”, and handed her the Italian floral job. Flustered, Harriet Harman (for it was she) said that she thought she had borrowed the gamp from her sister who, being called Sarah Jane Harman, had the same initials as me.
Looking at the two brollies, I said I could see how easily she might have confused the two. She failed to appreciate the joke. Am I surprised that she is up to her neck in effluent about dodgy donations? Am I hell.