If I were to hold a LU Zones 1-2 to Colchester (COL) advance ticket with a departure of Stratford (SRA) (XX:37), would it be valid to start from London Liverpool Street (LST) on the XX:30 (the same service as on the ticket, just one station early still in Zones 1-2), even if the train is marked as pick up only at Stratford? I found that Euston Square to Liverpool Street on the tube is easier and nicer than Euston - Tottenham Court Road - Stratford, and seating is much more available when boarding at Liverpool Street (Stratford can be manic at times).
This was a journey I have actually already completed and my ticket was unchecked for the whole journey (whoops!!) so I was never able to get real confirmation on this - the barriers at LST me through fine. Is the LU Zones 1-2 ticket even valid on National Rail services? The NR website didn't say anything about it, and the itinerary given by the forum ticketing site was a little undescriptive for the London transfer. I do have a bit of feedback to give about that!! I'm unlikely to make a similar journey again, but it would be good for reference.
This was a journey I have actually already completed and my ticket was unchecked for the whole journey (whoops!!) so I was never able to get real confirmation on this - the barriers at LST me through fine. Is the LU Zones 1-2 ticket even valid on National Rail services? The NR website didn't say anything about it, and the itinerary given by the forum ticketing site was a little undescriptive for the London transfer. I do have a bit of feedback to give about that!! I'm unlikely to make a similar journey again, but it would be good for reference.