I chose this site as I wanted to visit London and was on my own so didn't fancy trying to navigate to the other London sites. Very easy access from M25 but do as the book says and do not take first turn into Tilehouse Lane . If you follow directions in book no problems . As expected friendly warden who gave me good advice about getting into London and gave me timetables etc. Half hour walk from site to train station but beware,when you have walked round London all day the walk back to site is uphill. Plenty of parking near station or on station car park (free for blue badge holders ). Bit of aircraft noise but not offensive . Shops in Denham provide essential supplies . Really good Indian restaurant . Overall a lovly site ideal for London visits