Hi
Ian needs to park in Cowleaze car park just past Christmas Common. Most of the orchids seem to be on the left, exposed part of the reserve when looking at the reserve with your back to the car park. The Bald Hill walk is probably the one to do. The views are spectacular, as he must already know. I've attached the leaflet with the footpath map in it. I don't know whether you can add attachments to the site but the link is:
NE169 - Aston Rowant National Nature Reserve The .pdf is further down the screen.
Did you go? Any success?
alindsay