is it the Belgrade Student BS-1
It is indeed the BS-1 Trevor - well done
Incidentally wiki refers to it as the AAK BS-1 Student.
According to Wiki it's at the Belgrade Aviation Museum - I have a feeling one of our regulars has visited there
Sorry David...after all the effort you were pipped at the post. In the circumstances since Trevor has declared OH, I am sure no-one would object if control went to you.