Thank you for your comments. Just to clarify, especially to L. I haven't been directly asked for a C.V. but this is occasionally specified in submission requirements on websites or in the Yearbook.
Others are making valid references to genre and this is certainly an important consideration. There is a never-ending stream of detective fiction, for example, so you stand a good chance with that, assuming everything else is all right. Thrillers, too. My problem has always been to know what category my writing falls into. I can think of only two novels where I could, as I say, "stick a label on it". This poses a problem when writing the cover letter, although, only today, I went through Harry's short video on what to do when you've finished your book, which covers this point. It does seen to help.
I haven't noticed a preference for certain types of writer - except academics and journalists. This shows up in agents' client lists and details of competition winners, even where fiction is the issue.
I've decided not to worry about conveying that I'm not a novice.
I wish I could believe that just writing a good book is all that matters but it isn't.