Try the Open university Openings courses. Next start date June, cannot apply online, so you need to contact the OU. If you can start in June, your fees per course will be £195, the next intake will be subject to the new fees structure. You could finish as soon as October with a June start.
Update - checked a bit further, you are unlikely to be able to start for June. August/September starts are available. Unfortunately that does mean higher fees.
Talk to the OU about the qualifications you already have and see if one or more Openings courses could bring you up to the level a flexible university might grant you admission.