Tyler Fletcher opened the scoring with a well-crafted volley from outside the box, which looped over the Saints' defence and beyond goalkeeper Adli Mohamed.
Dan Gore doubled our lead after half an hour with a drilled finish from a similar spot, giving the young Reds a nice cushion heading into the interval.
Goals by Ethan Wheatley and Jack Moorhouse (2) after half-time proved enough to see off any potential comeback arising from Baylee Dipepa's second-half header.
The game kicked off with a relatively even battle in the opening moments, but it was Travis Binnion's side who struck first through Fletcher.