Midfielder Mandey almost equalised just before the break, but usual service resumed for the young Red Devils after the restart, as Lacey scored his third with a wicked left-footed shot which crept under Okonkwo.
United added a fourth as Jayce Fitzgerald’s corner was deflected in by Okonkwo, before substitute Bradley tapped in for a visiting fifth, and even a late Fitzgerald red card couldn’t prevent a United victory.
Albion: Okonkwo; Williams (c), Abudu, Diomande, Trialist, Nelson; Mfuamba, Blackshields (Colesby 64’); Mandey, Bostock (Parmar 76’), Chimeziri (Francis-Caesar 64’).
Substitutes: Cisse, DuPont.
Red card: Fitzgerald 89′ (Man Utd)