Run is from Car Park is National Trust Car Park, Headley Heath (not the Brimmer one we last visited in 2020 before lockdown).   From M25 Jn 9 roundabouts take A24 towards Dorking.  Continue to next roundabout and turn left into Reigate Road, which becomes Mill Way.  Continue on this road until the T-junction, then turn right.  Car park on right & cricket pitch on left. 

There is a charge but, hey, it’s a good cause. Overflow car park opposite and last resort is the cricket club (which may have a game).