Er, perhaps a bit of explanation. Like many (most?), I use the all-in-one solution and IME, that's not available in anything less than 120 ml at LHR T1, LHR T4 or STN. Presumably, if SmilingGirl's kit has two bottles, it's not the all-in-one solution.

I don't know whether Boots staff have been trained in giving useless, misleading information. One said I could buy a 120 ml bottle, pour out 20 ml and that would be OK at future insecurity checks. Wrong, it wouldn't.

Another seriously suggested I should buy a fresh 120 ml bottle beyond insecurity on every journey, discarding it on every trip.

As I said, Tesco to the rescue.