I've lost all the channels from the above multiplex, the main being BBC4 HD. I get my transmission from Winter Hill. Ayone else having problems?
I'm not on the Winter Hill transmitter myself, but have gone through many problems with the whole Com 7 issue.
I found most information online was either confusing, out of date, or simply wrong.
Have a look at the information here, I think it will help you understand what may be wrong.