These yachts are highly popular with the ‘super-bourgeoisie’ – and getting bigger. Can anything be done to stop them destroying our seas?

Who knew? Apparently everyone did, apart from me: you don’t wear shoes on a superyacht. Now, about to step on to my first teak deck at the Monaco Yacht Show, I’ve got to take my trainers off, and I’m having a sock panic. Have they got holes? Do they even match? Do they smell?

To be honest, I’ve come dressed all wrong for Europe’s big annual superyacht trade exhibition. The code for men seems to be crisp and tucked in, blazers and chinos, navy and white, sculpted hair and designer sunnies. (I went colourful, loose, casual). For women, it’s something like Riviera elegance. Everyone – whether they’re Italian, French, English, German, American, exhibitors, buyers, brokers, charterers – seems to know each other. The international superyacht community seems to be a close-knit one, and I’m not part of it. Yet.