Watch the landing fees in the UK. I am off to France from Bournemouth next weekend and was told be back before 9.30pm or the landing fees goes up from standard rate (whatever that is but you get a landing card with tthe plane so dont have to pay anyway!) to several hundred pounds (which somehow I dont think will be covered by the landing card!!!).
I cant see Bournemouth being the only place to do this so watch out if you ever get into night flying.