Getting to Trewethett Farm

The web page for this site now states that "The directions to the site have been changed since the publication of the latest site guide book" .  Unfortunately that's it as far as information goes - no link to the new directions, unless I have missed them no additional information as to what any change might have been.  Any members been there recently who can comment on how easy or difficult the approach to the site is or definite don'ts in approaching the site from the end of the M5?

Many thanks Lawrence