HULL TRAINS UP DATE.
they are currently using class 180 trains on most services, you hang your bike up , seems to be a fair bit of room so phil you should be ok, if your really lucky you many get a service with a old hst 125 train( they currently have 2 on loan) these have a good bike space( can get a tandem in no problem) staff member informed me the new trains with a very small cupboard for bikes are due in the new year.
Should you need to contact them , i have found there customer service to be far better then any other train company.