Originally Posted by
evanspa1
..... Heathrow - very impressive building. Often expensive. Rooms are great and exec lounge a big plus. Can take a little while to get to your terminal if not using T4. Free bus to T5? Expensive in-house limos to T1,2,3 ....
There is the free shuttle bus to T5, but the heathrow Express is free between terminals, so you can walk back over the covered footbridge to T4 and then go down and use the HEx to Heathrow Central or indeed T5!