I flew this very recently, and can confirm there’s a long gap between what is effectively lunch at 1500 UK time and the second meal (breakfast) 90 mins or so before landing. This is around 0100 UK time.

If your body clock is on UK time you might get quite hungry around 2100 or 2200 UK time (I did). There wasn’t much in Club Kitchen but I brought a decent cup noodle on board and the crew were more than happy to prepare this for me. We had a nice chat in the galley during the process which was welcomed too.