Henry Nebrensky wrote:
"John Rowland"
wrote in message
...

work? Admittedly there would be performance implications
from only having
one platform at T123 for some months, but it has to be
preferable to closing
T4 station.

Can trains turns back at Hatton Cross?

Yes, it was the termination point before Heathrow Central (now T12&3)
opened.