The owners of the site (Cemex Ltd) have approached the BMC to advise that this crag is within and forms part of a larger site that is an active and working quarry. They are legally bound by the Quarries Regulations 1999 to ensure that they take appropriate steps to prevent public access to the site, and have requested the BMC to inform climbers that climbing is not allowed at this site.
2020 update
Climbers have been heavily using this crag (especially during lockdown) with no issues. If approached by Cemtex Staff, please comply with their request if asked to leave and get in touch with your local access rep.