I am a keen, post-grade 8, amateur (i.e. non full-time!) violinist living in South London.  I'd be very glad to hear about any good chamber music courses, for good amateur musicians, that anyone is able to recommend.  I am keen to play more chamber music, but particularly in a professionally tutored environment.  I'd be very interested in hearing about any good weekly courses (e.g. 1 evening/weekend day per week), or e.g. week-long away courses of this nature that anyone can recommend. 
Does anyone know if any of the Academies in London run such courses, for adults (i.e. the Royal Academy of Music/Royal College/Guildhall, etc)?
Looking forward to getting some suggestions - thanks very much!