Heath brought to the club by Peter Reid had two spells as caretaker manager in his three years at the club.
Darren Robinson was the fitness coach and part-time reserve team boss whilst Andy Dibble only joined before Christmas but did a good job as goalkeeping coach. Both will be an asset to any club that employs them.
Covsupport thanks them for their time and help and wishes them all the best.
City will now announce Iain Dowie as manager at a 9am Press Conference at the Ricoh.