By James Rodger & Rom Preston-Ellis Thousands of Jet2, Ryanair, EasyJet and TUI passengers have been caught up in confusion at security checks due to a new hand luggage rule. Birmingham Airport is among those gearing up to roll out new liquid scanners that promise to ease the security process for all the major carriers. However, a staggering 15 per cent of travellers at the airport are having their carry-on bags turned away because of the existing liquid rule. It follows reports that airports such as Birmingham, Bristol and Liverpool John Lennon haven’t got the new tech up and running yet unli…