Nuisance calls, a new UK record?

We are nearing the end of our house build and recently had a phone line installed. We did not intend to use a phone on the line but just use it for internet.

However yesterday whilst delving into the back of a cupboard I found an old corded phone and came up with the idea of plugging it in and testing the line in the new house.

Only myself and BT know the number which is ex directory. Immediately after plugging the phone in I called the new number on my mobile and happily noted the phone ringing. I cancelled the call and replaced my mobile back in my pocket. Immediately the land line rang again and I assumed I had redialled accidently but when I checked my mobile I had not dialled out again.

Thinking now that this is probably BT acknowledging that the phone has been activated for the first time I answered. How wrong I was it was a PPE claim companies automated message.

The total time taken for the ex directory number to recieve a PPE call could not have been more than 30 seconds from plugging the phone in on a new line for the first time.

I give up........