Whilst fiddling around on net the other night I found this online course from the Tate. It is the first they've offered and they are planning on doing more. There is no formal accrediation or assessment but at only £20 I've purchased it as a little something extra to look at. Also the practical exerecises will help to keep me painting and drawing while I do my theory course. I've only had a quick look at the course so far it so far but there are loads of participants who have posted pics of their work and an active forum too.