I flew out to Venice (stealth I've been to Venice thread) on Monday from Glasgow. We were at the airport 4 hours before the flight and between slow bag drop and ridiculous security ques we made it by seconds, and that was at a sprint They were literally telling us on the tannoy our bags were about to be removed as we reached the gate. There were a good few who missed the flight. Also read Manchester is the same atm. So if you're leaving from either of these I'd be at the airport a good 6 or 7 hours before departure. Would have to think anyone went to the trouble and expense of going and fell at the first hurdle 👍
Also don't get mongoed, don't give them an excuse to refuse you.
And have an FFP2 mask. People were getting refused for having normal masks and being made to buy them but given the amount of people thay will be flying in those days they well sell out and you'll be humped.