I've booked a ticket to Venice from London leaving at 7:25am from Gatwick - I had all kinds of sensible reasons for doing this, but now am having second thoughts. Is this technically feasible? (I know that the first Gatwick express from Victoria leaves at 4:30, and they run every half hour thereafter). My hotel is near Earls Court station. I guess what I'm asking is how sticky are they about the time ahead - how risky is it to be later than two hours ahead of time. It's probably easier to rebook a hotel nearer to Gatwick for my last night than to try to change my airline booking (it's British Airways). And is the Gatwick express the best/fastest way to get there from where I am?