I wonder if this is similar to the switch over that happened with BBC 1 HD when it removed the SD from 103 and moved the HD to its place. Hopefully it is just a short term switch over issue and we have STV HD on the 103 channel. As others have mentioned, Virgin Media just signed a 4 year deal in Sept 18 with STV to show their channel. If not reinstated in the coming hours, I would say call Customer Services to query, like I will be doing.