In reply to DerwentDiluted:
Thanks for the heads-up.
I received a call off Tim Birch at Derbyshire Wildlife Trust this morning, who I suspect is the person you spoke to.
Part of the issue surrounding Moss Rake is that due to its new nature the info on the BMC's Regional Access Database and the UKC database hadn't been synced. As such, the former said "the restriction applies to the whole quarry to prevent disturbance to nesting Schedule 1 birds", whereas ours simply said to "avoid a particular area". This has now been updated.
What is of concern is to hear that another party took over an hour to leave when asked, which is clearly unacceptable behaviour and reflects very poorly on our community. Whilst I shouldn't have to remind anyone of this, if you are asked to move on as a result of nesting birds - particularly those that are rare or endangered - please do so as quickly as possible.