The second string produced a stunning performance to tear apart their English counterparts in Galashiels last night, with the impressive fly-half Duncan Weir grabbing 20 points.
The home side dominated with tries from Stuart Hogg, Weir, Rory Lawson and Matt Scott to make it a humiliating night to forget for England and a proud one for Bradley.
Bradley said: "The boys were determined to beat England and they went about their business very well.
"We had six Glasgow Warriors in the pack and that gave us a big advantage.
"It was a good day at the office and it was nice to come here so close to the home of the late Bill McLaren. I am sure that he would have been proud of us."
Indeed, Scotland's display was a fitting tribute to Scottish commentator McLaren who passed away last month aged 86, with Glasgow full-back Hogg going over to help his side take a 13-0 first-half lead.
England's frustration boiled over as James Gaskell and Ed Slater were sin-binned either side of the interval, while Lawson and Scott compounded England's misery by crossing the whitewash.
But it was Weir who grabbed the spotlight with three conversions, three penalties and a second-half try to take the man-of-the-match award.
The Warriors star's performance would not have gone unnoticed by Scotland boss Andy Robinson and he said: "I am pleased for the boys and I thought that the pack were tremendous and we played with a lot of confidence.
England coach Jon Callard blamed the result on a series of costly mistakes committed by his side.
"It was a bad day at the office," said Callard. "There was plenty of desire and commitment but we never really generated much momentum and when we did make errors they were expensive ones.
"When you make a few mistakes and you're behind on the scoreboard maybe you try and force things a bit, try some individual things that don't come off and before you know it you're even further behind.
"Credit to Scotland A for the way they played and the way they kept on coming at us.
"It's on nights like this that you get taught some lessons about yourself and this group is talented enough to learn from that and move on."