According to my records the two KINGFISHER Class ships that were at Southampton were the KINGFISHER and CYGNET. They were both towed from Portsmouth on 28 Feb 96 to Southampton. KINGFISHER was later sold, (date unknown) and renamed KINGFISHER OF SPARTA and was again renamed (date unknown) SANTA ELENA. CYGNET was sold in 1997 and renamed DUANA S and was reported as being used by a drugs cartel. This ship was seized by the Moroccan Navy and renamed LEXIS.
Also REDPOLE (Ex RAFAV SEA OTTER) was towed from Portsmouth to Southampton on 28 Feb 96. This was sold in 2000 and renamed BADTZMARU, later renamed RV LIBERTY and in 2012 was renamed SEAMAN GUARD VIRGINIA.
The other two of the KINGFISHER class, PETEREL and SANDPIPER, were sold to C. and H. Heuvelman B.V. (Netherlands) in 1991 and both sailed under their own power from Portsmouth on 19 Apr 91 and 25 Apr 1991 respectively.
I hope the above is useful to you.
Best regards,
Alan