I have been very lucky so far as I have had a seat, not the same one but I found one I could move to when in Birmingham. The one I was on was booked from there.
Only saving grace is the power socket at the seat. I have been watching a Laurel & Hardy DVD without sound, I am in the "Quite Zone" carriage.
Oh I passed my exam this morning. Hence no re-sit. Hence travelling back today.