Originally Posted by
NWIFlyer
That depends on where you originate. Last time I went through, which was a while ago, UK arrivals required transfer security - but the number of lanes is massive, and you're typically through in a minute or two.
It's actually more random than that. I have examples of where two UK flights arrived within an hour of each other on the same day, both to airbridges, and one got the transfer security treatment and the other tipped out onto the concourse. The understanding on the QR forum that it's a random selection of flights per day from origins considered to be safe that will be selected to avoid transfer security.