Originally Posted by
JJeffrey
I don't know that I'd say 3:15 is plenty of time given that will involve clearing UK immigration at T3, going to the arrivals lounge to shower/eat, then taking the train over to T5 and clearing security there.
i'm basing that on the assumption they will be out immigration doors in 15 minutes from leaving their plane. At least that's how long it took me arriving at T5. Can T3 be that different?