yeh i dont really want to change at clapham aswell.... im not that adventurous !
I do it every Monday to Friday day - not so bad
Kew bridge/brentford to clapham to grotwick
Reverse in evenings
Monday is nailsea to reading to grotwick
Friday ironically is cheaper to do grotwick to London bridge or st pancreas depending which tube lines I rancy to pad to nailsea