Jonathan was a very familiar face and voice on Television and Radio back in the early 1970's, he had already appeared in the second radio series of "All Gas & Gaiters" as Derek Nimmo's character Reverend Noote, when Nimmo couldn't record the series due to other commitments.
In 1973 he was invited to play Captain Cadbury in the Dad's Army episode "Things That Go Bump In The Night", which turned out to be Jimmy Beck's final TV broadcast episode as Private Walker. Jonathan would later take the lead in Jimmy's ITV show "Romany Jones" before embarking on many celebrated roles on TV, Film and Stage.

Oh Happy Band (TV Series)
Mr. Herbert
- Diplomatic Privilege (1980) ... Mr. Herbert
- Home Cure (1980) ... Mr. Herbert
- A Record to Be Proud of (1980) ... Mr. Herbert
- Let Bygones Be Bygones (1980) ... Mr. Herbert
- A Bird in the Bush (1980) ... Mr. Herbert