Hi Arthur bought mine on the back of you playing it though it took a few years to get one!!! £60 from memory.
Must be over or around 25 years ago.
ATB Chris.
Saw a bittern(flying) whilst afloat yesterday and the noise from the pinkfoot after dark was incredible.
Also on list,Marsh harriers,heron,cranes(fantastic and common in Thurne valley),grebes and flocks of what i thought were snow bunting