Well this is all very sudden and mysterious. Presumably there’s something specific behind it but not clear what that might be.
This role feels typical of so many infrastructure projects lately. Set a deadline, miss it, set another one, miss that too, get it in place in some limited form, oops that was a mistake.
It’s certainly never went away the many times I flew out of many UK airports. I’ve not flown out of all of them, but the ones I have flown from definitely had the 100ml limit