I found a most useful addition to the dry locker now the nights are drawing in is a motion sensing light. The one I found is powered from a 240v socket that automatically lights up when you open the locker. Got it from a local discount shop but seen the same on eBay for about £9.99.
Obviously you need a 240v socket in the locker which not all vans have but which is another very useful addition to power things like the terriyaki that we use a lot during summer months.