The former Lions striker, who is the club's all-time record goalscorer, took the position on an interim basis following the departure of Ian Holloway in March.

Millwall chairman John Berylson said: "When Neil took over we were already in a very difficult position, and the fact that we came so close to taking the season to the last game says a great deal about the job that he and David have done over the past few weeks."

"I have been greatly impressed with the professionalism and attention to detail Neil has demonstrated since becoming manager and he has undoubtedly inspired the players to produce some performances of real character."

"After five seasons in the Championship, relegation is undoubtedly a massive disappointment to us all. However, we started re-structuring back in February with the addition of a Head of Recruitment."

"Coupled with our flourishing Academy, which under Scott Fitzgerald has begun to produce good young players, there is a real sense of optimism going forward."

"I am fully committed to the future and know that our team is in the hands of men well versed in what it takes to make a successful Millwall side."

Millwall's relegation was confirmed last night when Rotherham managed to beat Reading 2-1.