PC John Jarvis was a police officer who was called the the siege at Home Farm in June 1994. He was a hostage negotiator. The gunman Reg Dawson accidentally shot Shirley Turner dead. His accomplice Colin Long spoke to Jarvis afterwards, advising him and his colleague on how to tackle Reg. Reg was shot dead by police marksmen and the siege ended.

Two years before he began playing the role of Ashley Thomas, actor John Middleton played Jarvis.

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