From what I'm reading here, if my flight leaves from concourse C I should leave the lounge 15 minutes before boarding? As in 45 minutes before the flight?
If it makes a difference, my flight is around 10AM on the day after New Years (less passengers?)
I have priority (BA Avios) but as far as know that only helps for boarding, not for security.
I have a wheely which I would rather not gate check.