get yourself a copy of War Prizes by Phil Butler, published by Midland Counties but I guess the information you have might be pulled from here anyway

this shows

AM42 as Si 204D-1 W Nr 251147
7J+XL of NJG102

Surrendered at Copenhagen/Kastrup where marked as K42 and ferried to Farnborough on 7/10/45

No date of transfer to Miles given, but subsequently scrapped at Woodley

Of the VP320-339 block only the first three were allocated (W Nrs 251710/1252/251527)

Disposition
VP320 – to A de l’A 19/6/46
VP321/322 scrapped Fuhlbuttel 28/5/46