Leeneia: you may well be right that that is what they wanted, but they very deliberately asked for something else. They could have asked for a statement that shows my address. But they specifically asked for proof the statement had been sent to me and ALSO shows my address. So there are two very specific requirements which they took the trouble to underline, and reason would suggest that the word "also""was put in because they previously had the simpler form and someone decided it was not good enough.

Or I could be over-thinking it!