Hi - have only just seen your reply. In fact I was wrong!
It turns out it was coincidence that I got my service back, and the suggestions weren't even deleted. The function does not work.
As it happens the error has now become C130 and A01.
Given past bad experience, I suspect that what is going on is some weakend on the service in the area and insteand of Virgin telling us all in advance, over the next few weeks while we do upgrade work or whatever, you will have an intermitent service (and we will deduct x% of your bill).
This is what happened to me 2/3 years ago. Hours of engineers coming and going, new cabling, new boxes and as one engineer told me (unofficially) the area is being upgraded this will go on for 3 months and he was right.