Hello there. I was planning to take a return from Derby to Dundee, travelling up on the first train on 5/6 and coming back overnight, on the sleeper, via Crewe. I haven't yet purchased my ticket or the sleeper supplement. With the strike for 24 hours from 17:00 4/6, I've now got a bit of a quandary. I presume if I buy the ticket and supplement now and the railway can't transport me, they'll refund my ticket, but will they refund the sleeper supplement too (given that train won't be directly affected by the strike)? Conversely, if the strike is called off, how late can I leave booking the sleeper berth (I really don't want to travel back overnight in a reclining seat)? Thanks for any advice.