Underwriters
Hi englishal,
I don't know whether XX's underwriters are also your underwriters, if so then that's a good start. If not, then the statement from XX's underwriters is of no value TO YOU.
I still feel that you need to have a nice letter on headed notepaper on YOUR file from YOUR insurer confirming the matter in question.
Then, and only then, will you be safe in assuming a CRI will be adequate for the purpose in question.
Broomstick.