Birds In Britain
The first episode was broadcast on 19 March 1951 and was presented by Fisher and produced by Desmond Hawkins , with guest speakers John Gibb ( Edward Grey Institute ) , Bruce Campbell ( British Trust for Ornithology ) , Hilda Quick ( Cornwall Birdwatching Society ) and Ludwig Koch . 
<triplet> Bruce Campbell <subj> British Trust for Ornithology <obj> employer