The not so friendly woman on the phone said that cx would be fine with it but immigration may not.

I guess I might just have to bite the bullet and pay up but it's really annoying! Normally I'd probably take the chance but I'm flying put for mew years eve and have a connection to Australia the following day so don't want any hassle delaying my departure.

I don't think this is actually the first time I've made this mistake though! I just can't remember what I did last time! (it was many years ago and may be different now in a security conscious world)