I planted mine out in the end, having realised that it was unlikely that the Teenager would remember to water them if it didn't rain while we were away in France.
I surrounded them with lots of slug pellets, and those little houses Lidl were selling that you can fill up with beer.
No evidence of slug or snail damage, though not a lot of evidence of growth, either. It's been very wet this week (nice in Brittany, though, and I don't think I met Tobyjug there, either), but everythign else has flourished - a good 15cm on the tomato plants, strawbs going bonkers, spuds looking like a jungle, etc. The beans and the courgettes, though, are looking a bit sorry for themselves. Bah.