For several days, the picture in several channels on our digital television set has been distorted and virtually unwatchable.

I am told this is caused by work on the Oxford transmitter in preparation for the (unnecessary and costly) switch-over to digital TV. The work may continue for two months.

I believe that Mark Thompson, the BBC boss, lives in Oxford.

Perhaps he could write in and tell us if people affected by this interference will get a refund on their TV licences.

Tony Augarde, Carlton Road, Oxford