Ah. I thought the c was for circa.
Like I said, I'm sure others have had this issue. I'm not sure where you can find out the best results customers have had (other than Ofwat).
Mmm, not necessarily that useful, but I can't see a thread about them and not say anything.
No it won't be linked to them, but it will often be outside your property, so they can come and read it any time without you knowing.
I'm not sure there is a simple answer, and imagine you'll need to...