I am indebted to our friends at YouView for this announcement:
We have been informed of a high pressure system working it's way over to the UK and should reach here in the early hours of Sunday morning. This high atmospheric pressure is currently predicted to last until Wednesday (22/01).
High pressure weather conditions can cause picture break up or loss of channels for some viewers across the UK along with YVM302 error messages on YouView devices.
If you are affected by this, please don't retune your box until the high pressure system has passed, as this can sometimes make the problem worse.