“Even if a UK airport does have the new scanners in full operation, the traveller’s destination airport might not, meaning they will be subject to the 100ml liquid rules when taking their return flight,” it warned.

Luke Petherbridge, the Director of public affairs, stated: “What travellers need now, as we head towards the peak months for overseas travel, is clarity about what to do when going through airport security.

“When fully implemented, the new airport scanners will make things faster and strengthen security. However, the recent extensions from the Government show that there is still some way to go before the new security rules are consistently in place across UK airports.

“With that in mind, our best advice is to prepare for your travels with the existing rules in mind. That way, you’ll be ready to comply whatever the scenario, avoiding any unnecessary delays through security and any difficulties when returning from your destination. You can also check with your airport in advance and we’d also recommend checking with your return airport too.