The 100ml rule was introduced in 2006 following a failed terror plot. The government had originally sought for airports to make the necessary upgrades by 2022, but the timetable was pushed back to 2024.
Heathrow has introduced new scanners at three of its four terminals, but could not commit to meeting the 1 June deadline. Gatwick, meanwhile, said it had made “significant progress” at both of its terminals, but did not expect to complete the upgrade until “early next year”.
Manchester Airports Group, which owns Manchester, Stansted and East Midlands airports, said despite making “good progress” on its rollout, it was unlikely to be complete until 2025.