Live in Buckinghamshire. With the heat wave coming this week it would be really nice to get out of my hometown with the kids and go to a beach (although I’m now thinking that could be a bad idea travelling a minimum of 2 hours just to get there) or a lake where we can swim. Can anyone who is familiar with this area recommend any hidden beauty spots that won’t be too busy where we can chill and swim? Don’t mind driving for about 1.5 hours to destination? Thanks