Mills defeated stablemate Jarvis Anderson in the final with Thomas Clarke, Michael Stephenson and Jack Shaylor all winning their respective fights on a night that saw club make a clean sweep across four divisions.
“We’re really pleased with the lads,” said the academy’s head coach Sid Thompson.
“They did well; there’s some things to work on but they are progressing nicely.”
Mills won the evening’s main event having picked up two victories earlier in the evening to qualify for the final.
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In the final he outpointed team-mate Anderson over three closely-contested two-minute rounds.
“It’s a tough thing, facing one of your friends in a fight like that,” said Mills. But that’s sport for you.
“With a fight like that, when you know your opponent, you look to win it on points and he’s got a nasty little overhand which I wanted to keep clear of.
“It could have gone either way but I think it was the right result. It was a good result for our team – we’ve come here and won everything.”
Runner-up Anderson said: “We always said that if it came down to a points fight he’d (Mills) win.
“He moves about the ring really well. I hit him with a couple of rockers but I think it was probably a fair result.”
Fighting on the undercard last weekend, Clarke and Stephenson retained their respective super-middleweight and cruiserweight iBox belts.
Jack Shaylor only needed 25 seconds to stop Jimmy O’Mahony, from Whittlesey ABC in Cambridgeshire, in an iBox heavyweight eliminator bout.