There are two separate issues here:
what is a valid connection for the railway to accept responsibility for onward travel?
what is a sensible connection when the next train is several hours later?
In this case, I would go with alastairlees and aim to be at Euston around the time the train is platforms (BTW can one use the Lounge these days?)
what is a valid connection for the railway to accept responsibility for onward travel?
what is a sensible connection when the next train is several hours later?
In this case, I would go with alastairlees and aim to be at Euston around the time the train is platforms (BTW can one use the Lounge these days?)