Any nice camp sites near m4 on route to London?

[PavlovtheForgetfulCat]

We are heading into london for Bruce Springsteen concert on the sunday, have a baby sitter for the night before and the night of the concert, thought we might quite like to take our romantic soulpad tent and sleep under the stars just the two of us on the way down the night before.

Any ideas where we can camp that is nice, quiet, maybe even has a view.

LOL I just realised, that would be right under the heathrow flight path....nice and romantic.

So let me do another thread, for those who might know of some-where less noisy but perhaps further afield