I'm having the same problem as you in Cornwall.
Was picking up W Cornwall transmitter, then the W Devon & E Cornwall transmitter swithced, and I've lost Top-Up and Virgin 1, Fiver and Five Life etc, something to do with MUX B.
My EPG went from 14 to 7 days, then to 3 and now 1, and I've got hardly any info on the EPG.
Anthony
August 2009