The BBC Trust, which oversees the whole organisation, have started a review of radios 2 and 6music. They want to hear from listeners (or ex listeners) about what you think is good/bad about the stations.

It only takes a couple of minutes. There's an online form here.

http://www.bbc.co.uk/bbctrust/consultations/departments/bbc/bbc-radio-2-and-bbc-6-music/consultation/consult_view

You may wish to mention the fuck-awful George Lamb show. I know I did.