I received a letter yesterday threatening to cut my gas off because I had not responded to previous letters, none of which I got. I suppose it could be the gas company but I think the post is more likely.
I do wonder what else I'm not getting.
I have also ntoiced a marked downturn in the postal service the past couple of months. I know for a fact that I have been sent magazines, a birthday card and a cheque but these haven't arrived (and of course there will be missing mail I don't know about).
You can actually go to the Royal Mail website, and in the Customer Services section fill in a form for late/lost mail. You can also claim compensation even without proof of posting.