Yes I do know 4AUF. She was first seen by me at Wibsey Park on 04/11/14. She spent some time at the Yorkshire Swan Rescue Hospital as a cygnet with a broken leg from10/10/13, was released and ringed Z52757 at Pugneys Country Park, Wakefield on 03/12/13. It was next reported at Pine Lake, Carnforth on 03/06/14 where it was ringed with Darvic ring 4AUF. It was still there on 30/07/14 and next reported at Wibsey Park by me. I hope this is of interest to you.
Regards Judy
BS