Originally Posted by highpeaklad
Am I allowed to use the T1 lounge if I arrive at T4?
Yes - when you transfer to T1, go out to the landside area where all the check in desks are. To avoid the crowds, go out the door onto the sidewalk and walk all the way down to your left, back in the last door, keep walking you'll pass by the 1st class check in, then keep going and you'll find the BA arrivals lounge. It's not v. big, but you can catch a shower, get your duds pressed, and a big greasy fry up in you can handle it
You can ask for poached eggs and toast if the buffet grease-a-thon makes you queasy.