In reply to Simon2005:
There is a history of conflict here. The farmer never seemed to accept that this bit of his land was mapped as access land and has turned climbers away at various times of year quoting several different reasons. He has been spoken to by BMC access officers and National Park Rangers several times over the last 10 years but still seems to have an issue with climbers. He does have the right to make short term temporary closures but I believe these should be notified to the Local Access Forum and I understood that clear notices should be placed ( I'll check that and get back to you).
By Coincidence I was at Pot Scar today and on coming down met a group of climbers in the cafe who had been at Feizor all day. They said they had seen a farmer but he hadn't challenged them.
Just as a point of reference did you take your car up below the crag? I know he has complained about that before?
I suggest a useful tactic in future is to call at the cafe on your way up, buy a snack and state your intentions to the ladies in there who are all, I believe, related to the local farmers and know what is going on. They are very good about letting you use the cafe car park for the day if you tell them you are climbing.