Rothwell exerted a growing influence in midfield as the Reds were only sporadically troubled with Witham spurning the clearest opening for some time when firing across goal.
Trialist Fisayo Adarabioyo took over Wilson's striking duties with Sam Byrne operating down the left after Butt made a couple of changes and he tried a curling shot that was comfortably saved by Ashton. With a raft of substitutions disrupting the flow of play, United were able to take the sting out of the opposition with a degree of comfort.
Adarabioyo and Jamie Cairns traded weak efforts as the EvoStik League side were unable to get back on level terms with Butt's youngsters running out convincing victors on a pleasant evening in Lancashire.
United: Gollini; Weir (Love 72), McNair, Grimshaw, Rowley; Barmby, Rudge (Adarabioyo 66), Rothwell, Pereira; Lawrence, Wilson (Byrne 66). Sub not used: Sutherland.