I have a train ticket which I bought in advance and now no longer need;
5th Feb, 17:30 Bristol TM to London (Letchworth actually) £15 (actual cost £25 and now may be over £30 - so a bargain)
It has a seat reservation AND a bicycle reservation. I can provide photos for a proof.
If you are interested please let me know.
Only local pick-up, around Temple Meads.