One of MANY options available to you (If you live in London) is Birkbeck University. They recently had an Open Day and offer hundreds of part time course to sharpen your skills during the downturn. Courses are quite reasonable ranging from £150 - £300 per module contributing towards a Certificate of Higher Education, Diploma or a Degree.
No previous qualifications needed to get on these courses. Campuses situated all around London.
You can check out the university on the following link: www.bbk.ac.uk