Originally Posted by
AndyHall
The point is that you do have to have a BP to get past security
As you mention, there is some contradictory information... including this.
No, you do
not have to have a BP to clear security at LHR T3 Flight Connections. You'll be asked for one if you use Fast Track (to confirm eligibility), but you can always veer right and go through normal security (which is often just as fast) and there is no BP check there.