Originally Posted by
scapaflow
I did this route two weeks ago. Since you have to go back through security in T1 it is unlikely you will have time to go to the arrivals lounge. It will also depend on how quickly your plane hooks to the terminal. At LHR you usually have a some tarmac or in the air waiting time as well.
Can I walk from T3 to T1 or do I need to take a bus or other means of transportations?
I know there is passport control there as well. Hopefully, with EU passport the procedure will be fatser.
Thanks.