In reply to Andy Say:
We tried to go climbing at Shooters Nab last week and had a run in with the rifle range...:
We turned up at the crag (approaching from Marsden) and could see the red flags and the club was shooting but followed all the rules exactly. As we were gearing up to the right of the rostrum to climb Sweatyman, a drone with a speaker turned up and said we were breaking the access agreement which it claimed was only after 6pm on Fridays and told us to leave.
I stood my ground and pointed to the relevant guidebook page and indicated with my hands that we weren’t going to the left of the rostrum (it's a fairly one way conversation with a drone). The drone then flew away and said the police were coming.
We waited at the base of the crag and the police turned up swiftly as they were running a shooting course at the range. We had a perfectly reasonable discussion with the policeman and made it clear we were going to leave but we explained that we were climbing within the access agreement (I checked later that there were no closures to the CRoW land on the Natural England website). We overheard the range warden on the radio saying the access agreement was only after 6pm on Fridays so the policeman photographed the relevant guidebook page to show the warden.
As we were leaving we overheard another radio conversation where the warden told the police it was ok if you stayed to the right of a marker on the crag... (ie rostrum rightwards) and we were within the access agreement...
I emailed the BMC to let them know and we went off to climb at Pule Hill in the sun.