"Tim Roll-Pickering" wrote

Yes but at least there will be the opportunity to regain times. I suspect
for similar reasons Orbirail will not feature a regular full circuit
service.

AIUI Orbirail will be Clapham Junction - SLL - ELL - NLL - WLL -Clapham
Junction, so trains will have to reverse at Clapham Junction, and would
probably alternate clockwise and counter-clockwise routes.

Peter