Somewhere near a nice sandy beach pref. walking distance (nice weather would be good too if you can fix that I'm not unreasonable low mid 70's sunny days is fine by me )
nice self-catering
garden (dcs would love a trampoline)
decent cottage with reasonably up to date decor
child friendly
not too mass market
(can't camp dc1 is a wanderer)
pool would be really fab if a complex type place but must be fenced therefore no pond/river/lake/stream unless fenced youngest dc has no fear and no common sense
oh and ideally not too far from London!!