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Tonbridge boss Tommy Warrilow announced his resignation after Angels were relegated on Easter Monday – but the decision was made weeks ago.
Angels’ relegation from Skrill South was confirmed after a 7-1 humiliation at Chelmsford.
Warrilow, who has recommended a successor to chairman Steve Churcher, said: “It wasn’t a knee-jerk reaction – the board have known about this for a while.
“There’s not been a good atmosphere around the place and the club need a change.
“Six-and-a-half years is a long time to be at a club and maybe people are tired of me.
“The chairman thought I was the man to get us back up but I think this is the best decision for the club and the board.”
Warrilow will take charge for the final time when Angels host Havant on Saturday.
He took Tonbridge from the foot of the Ryman League Premier Division to play-off glory and a club-record ninth-placed finish in Conference South.