My phone has rung twice this morning - 1471 indicates that the caller was the same both times.
A little research reveals that it is British Gas. Now they were my gas supplier when I first moved here, and at a previous house they were my electricity supplier. In addition my late Mum was their customer for both.
In the months that I was dealing with her estate, I had repeated calls from them asking me to settle her last bill. I told them I could not do so until I got probate. Time after time they called and I said why don't you have a note on the account, this is when I expect probate to be granted. It happened, they were paid and they continued to pester me.
I had the same problem after I sold my previous house. The last bill was paid and I supplied proof and they insisted that money was still owing. Finally I switched suppliers and simply told them when they called that they had made a mistake and I was not their customer.
The latest batch of calls, however are not billing. I discovered through a very useful website that the number is a sales one and they are trying to get me to switch back. I don't have caller display on my home phone, but beginning to think its a good idea.
The website is useful for calls like this and also if you are left with a non-geographic number and asked to call back. Don't do it. Find out who it is here and save yourself some money. Also if you only have an 0870/08450 number for a company, look them up and see if you can get a 'real' number.
If British Gas call me just once more today, I have all the information I need to report the calls as harassment from this site's forum.