@MJWG if you're seeing a 'no satellite signal' when you try to view these channels, the cause is most likely a fault with your dish (not aerial) or cables. Unfortunately Sky no longer provide engineer support for Sky+ equipment unless you have Sky Protect, so you'll need to contact a local satellite engineer to take a look at your own expense.
Alternatively now might be a good time to consider upgrading to Sky Q. Any dish or cabling issues will be addressed as part of the Sky Q installation at no additional cost to you.
