I'm afraid it's not a jobsworth, it is the law. There is no way a UK airport operator can compromise the integrity of the Critical Part of its Security Restricted Area by enabling the kind of flexibility that would support a military operation. No liquids or gels (exactly what is a yoghurt...?), permitted tools only, no weapons, explosives or pyrotechnics, personnel screening inbound, long waiting times for security pass issue..... As alluded to above, a potential airport would need to provide a dedicated enclave with its own access that could be completely segregated from the airport operation....a flaky bit of concrete that is not earning money as a car park, probably.