I had another look see in my sources and suddenly the Peterhead turned up. Unfortunatly not the information Axel was looking for:

Peterhead (J.59) - minesweeping sloop of the Bangor class. Built at Blyth: Whites M.E. Commissioned 31/10/40. Scrapped at Pembroke Dock in May 1948.

Minster (T.198) - auxiliary minelayer, built 1924, 707 grt, requisitioned by the R.N. in August, 1940. Mined off Normandy on June 8, 1944.

Regards Jan-Olof