Conditions this morning were ice-cold, ensuring that kick-off had to be put back by half an hour.
But when the Blues finally hit the pitch, their performance was red-hot at the CFA.
Mukasa gave Ben Wilkinson’s side an interval advantage with a cool finish after fine work to set him up by fellow scorer Harrison.
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Harrison doubled the lead after the break with a clinical strike from the left.
With the game well into stoppage time, Harrison bagged another with a clinical effort, again from the left channel.
City remain third in the Premier League U18 division but are now just two points behind second place Liverpool - importantly, though, with two games in hand.
Watch the best of the action in the video player above.
