Carlisle United's League One rivals Cambridge United are looking for their third manager of the season after Neil Harris quit.

He has returned to take charge at Millwall after just two-and-a-half months at the Abbey Stadium.

Harris oversaw only 14 games as Cambridge boss after replacing Mark Bonner in December.

But now he has been lured back to the Championship at a club where he had an illustrious spell as player before a stint as manager from 2015 to 2019.

Cambridge said they have secured compensation for the 46-year-old, whose penultimate game in charge of the club was their 4-0 win at Carlisle last weekend.

His last game was a 2-1 home defeat to Bolton Wanderers on Tuesday night. Harris has since been confirmed as the replacement for Joe Edwards at The Den.

Cambridge have placed Barry Corr in caretaker charge, assisted by Kevin Betsy.

The Abbey Stadium club issued a short statement which said: "Neil Harris has today left his role as head coach of Cambridge United to join Championship side Millwall, following an official approach this morning and contractual compensation being paid...

News and Star: Harris was in charge for just 14 games at CambridgeHarris was in charge for just 14 games at Cambridge (Image: PA)

"Assistant head coach Barry Corr, supported by Kevin Betsy, will take charge of the team ahead of Saturday’s game against Peterborough United."

Harris leaves Cambridge 17th in the third tier, six points above the relegation zone. They were 18th when he took charge.

His move to Millwall means he will have managed in three different divisions in one season, having been sacked by League Two club Gillingham last October. The Lions are fourth bottom of the Championship after four straight defeats.

Harris's departure from Cambridge is the tenth managerial departure in League One's bottom eight clubs this season, with only Carlisle among those sides to have stuck with the boss who started the campaign in charge.

Charlton Athletic and Fleetwood Town have changed managers twice this campaign with Cheltenham Town, Port Vale, Burton Albion and Shrewsbury Town also on their second boss of the season.