Peter Frimberley wrote:
I've a vague feeling that the newish Heathrow Express tunnels also
made provision for a T5 station where the original plan for it was,
however that provision too has turned out useless.



The Heathrow Express provision is being used! It is a spur by Central
station, where the current Heathrow Connect trains reverse (not in
passenger use, obviously). The spur, which was put in during the
original construction, is being extended to Terminal 5 as originally
planned.

PhilD

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