"Peter Smyth" wrote in message
...

If one loop goes HX-T4-T123-HX and the other goes HX-T123-T5-HX, then
the
diagram will need to resemble a pair of testicles at the end of the
line,
no?

T5 will not be on a loop. Some trains will go HX-T4-T123-HX as now and the
others will go HX-T123-T5(reverse)-T123-HX


So how will that work with the two platforms at T123? Will one be used
exclusively for London-bound trains that have gone round the loop, and the
other for bi-directional trains on a single track extension to T5?

Or will it be one platform be for T5 only, and the other for both sets of
London-bound trains? (which would make more sense to the traveller, but be
logistically more difficult to implement, and result in a bizarre station
where twice as many trains went in one direction as t'other.)

BTN