Verging slightly off topic... I got a scam call a few days ago, from somebody claiming to be from an energy utility, “just checking whether if I had been upgraded to a smart meter yet”.
Caller was reasonably well spoken, bright and enthusiastic, native UK accent. I am regarding it as a scam, because he indicated to be representing a supplier (not specifically identified) with some knowledge of my account, yet addressed me by name of better half which is phone book, whereas energy utility bills have always been in my own name.
No idea what the scammer’s payload would have been. Maybe relatively innocent, just wanting a “finders fee” if he persuaded some random consumer to switch supplier. Or maybe something much more sinister.
Worth bearing in mind, if you get such a call out of the blue.