Once through, he quickly identified a member of staff from an engineering firm and requested they cut the chains on the nearby gates to allow access for emergency vehicles.
Wedi cyrraedd yr ochr arall, chwiliodd yn gyflym am aelod staff cwmni peirianneg cyfagos a gofyn iddynt dorri’r cadwyni ar y gatiau er mwyn caniatáu mynediad i’r cerbydau argyfwng.