Following a brief return to Blackburn, he then had a multitude of coaching roles for various clubs over the next two decades, including a stint in Saudi Arabia.
Dinnis briefly acted as caretaker manager of the club, when Ken Furphy left to join Sheffield United.
It led to one of the most controversial months in the club history and to the appointment of Dinnis as caretaker manager until the end of the season.
Newcastle then met Irish Premier League club, Bohemians in the UEFA Cup, a game they were expected to win, but they drew 0–0.
They then won the home leg 4–0 to qualify for the next round, where they were defeated by a Johnny Rep inspired Bastia, who went on to the final.
[6] He coached Philadelphia Fury of the North American Soccer League in 1978, but resigned mid-season and was replaced by player-coach Alan Ball.
[1] Afterwards, he joined Bristol City as chief scout, and from January and April 1982, he was assistant manager to Roy Hodgson.
[2] He later spent time coaching at Accrington Stanley,[2] Barrow and for the centres of excellence at Burnley and Bolton Wanderers.
[1] He also worked as a summariser and analyst for BBC Radio Lancashire up until the late 2000s, dealing with Blackburn, Blackpool, Burnley and Preston North End.