Peter: Yes you can eat sprout leaves in that they're not harmful but in my experience (and I only tried it once) they're certainly less appealing than 'proper' leafy brassicas.
Harry: As you'll soon be finding out in my next blog, I've got another unexpected invader in my garden....but luckily its actually pretty harmless and only got as far as the drive!!
Rean: So glad to hear your sweetcorn is great and those first cobs of the first plants you ever grew will stay in your mind forever, so get on and enjoy them whilst they're there!