There are a few 'chains' of cheap rooms available - usually close to motorways or A-roads - Travelodges - usually clean and pleasant, and tend to cost in the region of £35ish per night.
If you want no frills accommodation - there are the Formule One hotels - £25 per night, usually clean, but not particularly pleasant!!
Hope you enjoy your time in the UK; If you're coming up to Robin Hood territory (East Midlands, Nottinghamshire) let me know and if possible, will meet up for a beer or three!!
Cheers,
Bull!