Hi, I'm brand new to this but this excellent site has helped me before. I've found a direct line number that I cannot find in your search engine so: IBIS Carlisle 01228 518000
FYI for any other disabled users, at IBIS and Premier Inn & Travelodge, you have to ring the hotel directly if you need an accessible shower rather than shower over the bath. Central Reservations have no clue!
If you use the central reservations number they may insist on putting you through to the hotel - at high cost.