I used to go to one up on marlborough downs - fab hacking, you can get up to barbury castle, cross country courses etc...
its near rockley, on the swindon side of marlborough... it used to be run by ali byrne? and jilly ? who runs manton grange stud just outside marlborough!
well yard in question is small, nice people, all year round turnout, right by the downs so fantastic riding, menage is in middle of being built however there are only spaces for part/full livery.
There's a lovely yard in Broad Hinton, is that close enough for you? Also one in Purton that's very nice, and a couple near Wootton Bassett and Calne...