The last time I was at Termnal 5 was in March 2019. I seem to remember the Gate number was given about 90 minutes before loading. I thought I saw somewhere here on FlyerTalk someone mentioned it is now 30 minutes.

If alll goes well I arrive at Terminal 5 at 6:45am and departure is Terminal 5 at 9:50am. I would like to spend the time waiting in the Galleries Lounge even it's for a little while. If the Gate announcement is actually 30 minutes, that makes me a little nervous as I will need wheelchair assistance. I don't want to be dumped somewhere not knowing what gate I will depart at.

Can anyone give me some insight on my question/answer?