In reply to pancakeandchips:
Leaving aside the ethics of bolting and large scale vegetation removal for a couple of routes....
> to all appearances hasnt been climbed in before.
Consultant your local definitive guide carefully, they often list 'other venues' within the text. The quarry may well have been explored before (20+ years ago), nature takes hold quickly and stuff done with heavy gardening or soon after many of these quarrie were abandoned now looks unclimbed. Of course if is of suspect quality it will have not attracted climbers since. Whilst I understand you want to keep the location secret and take the glory local activities/BMC reps should be considered if you are unsure.
> It'll need some cleaning (extreme gardening) as well as sessions hanging around bolting to make it possible.
Some vegetation is protected and it's removal could easily be noticed. It may even be a site may be a SSSI (this doesn't always mean no climbing).
Post edited at 12:19