A related question for those wiser than me... I am flying to LHR-MIA (and onwards) in a few weeks, and looking at the schedule I have beforehand it might be a bit tight. This is an A380 flight from LHR T3, so not T5 (not sure if rules are different?). I will be HBO and Silver (and well equipped for running through airports....) My question is...

If I have checked in online, have BP on my phone, is the limiting factor T-35 conformance for security? I.e. I would need to have scanned through security by 13:20 for a 13:55 departure? I note that check in closes at T-60, but am unsure whether OLCI is enough or not in this case as I assume it is also necessary to do the passport/visa check before entering security. I habitually go to the check in desk to get a paper BP normally, so not thought about it before.

Thanks

(Edit in italics)