Originally Posted by
BA_Blade
You certainly don't need 2 hours. I usually try and arrive 40 minutes before a flight at LCY as I hate rushing and that usually gives me enough time for a coffee in depatures. I would say the minimum you should allow for is 15 minutes to clear security and get to the gate.
This is what I normally try to allow too. On a good day you can get away with less time but I would be reluctant to take the risk by choice (rather than traffic delays etc.).