I was entranced by the idea of a maze in Trafalgar Square.

But completely put off by the queue and the cacophony of music blaring out of speakers.

(It looks much better - and bigger - in this picture than it does when you're there.)

And I thought that if this were Paris, a maze would be chic and amusing. Instead, I was repelled by the fat tourists in shorts and the litter and most of all the noise.

So I turned my back and went into the National Gallery. Which, as ever, is very good for the soul.