For my tuppeny worth, that's why it is a good idea to check pressurisation at Flaps Up, to avoid the rubber jungle at 14000. It happened to me once, no pressurisation, noticed it during this check, and we levelled at the SID cap and returned.
Often it is in the after takeoff checks, but my airline did these at FL100, which might have been too late. I wonder what FLYBe do? If everything was OK during After Takeoff checks below FL100, what caused the depressuriastion? Perhaps they also do them at higher level.