Complex sentence: During the filming of Series 5 of Wycliffe he fell ill with meningitis, while he was in hospital the rest of the cast took the decision to quit the show, a dispute had taken place over the production company wanting to terminate Jimmy's Contract.
Split into simpler sentences: During the filming of Series 5 of Wycliffe, he fell ill with meningitis. While he was in hospital, the rest of the cast took the decision to quit the show; a dispute had taken place over the production company wanting to terminate Jimmy's Contract.