T5 to T4 is by far the worst.
I don't know why they quote
LHR T1 to T5 = 2h
LHR T4 to T5 = 2h
When T5 to T4 is by far the worst landside.
Perhaps the published Minimum Connecting Times are only referring to Airside.
Yes they are far too long. I have been forced to wait and EXTRA 21/2 hours because a 1Hr 50Min connection was too tight!!! (T1 to T5)