The result made it eight wins on the trot in the FA Premier Reserve League South as we continue to battle it out with Arsenal for the title.
The game had barely got going - just under two minutes on the clock - when Charlie Lee played the ball into the path of Barnard, who proceeded to do what he does best - stick the ball in the back of the net. He struck low past Saints keeper Zac Jones to register his 18th goal of the season.
Southampton were a little stunned by the early strike and were planted on the back foot by an energetic opening from our young side - the only player with any first team experience being Goran Bunjevcevic.
It was another freezing night for reserve team football, which might go some way towards explaining the incredibly high tempo being played out on the pitch. The Academy midfield combination of Stuart Lewis and Joe Martin was pretty much bossing affairs in the centre, while Jamie Davis was providing a significant threat down the right flank.
Saints first chance did not arrive until 32 minutes when McGoldrick broke into the area and shot into the side netting after good work from Dutton-Black.
Another chance came from a Martin free-kick which just cleared the head of both Barnard and Bunjevcevic before, at the other end, McGoldrick again posed the threat after Bale crossed low and the striker flashed his effort just wide.
The advantage was so nearly doubled in the first minute of the second half when a Martin corner fell invitingly for Lee in front of goal, but the central defender's header was just a little too high.
Saints managed to press forward more and it took two vital interceptions from Leigh Mills to deny further threat. James then blasted high when presented with a decent chance in front of goal.
The visitors had found a renewed purpose and there was an excellent chance for McGoldrick from a low cross from Dutton-Black which veered just wide. At the other end, a Martin free-kick on the edge of the area was clutched just in time by Jones as the ball was heading towards the top corner.
The leveller came on 57 minutes when Dutton-Black again provided an accurate cross and this time McGoldrick made no mistake with his finish, giving Rob Burch no chance at all.
Clive responded by swapping Davis for Simon Dawkins in a bid to beef up the attack as the physical advantages of Southampton were beginning to tell.
The boys then seized an opportunity on the break after 70 minutes when a Barnard cross was met at the far post by a combination of El-Hamdaoui and Barcham and the ball was bundled into the net. It was awarded to El-Hamdaoui, but doubtless there will be further debate to come.
Burch came to the rescue 15 minutes from time when McGoldrick found himself clean through. He was just set to round the goalkeeper when the long arms of Burch grabbed the ball at the striker's feet and the lead was maintained.
GUIDE TO THE ACTION
2mins: GOAL 1-0 Charlie Lee throughball from deep in his own half lands in the path of Lee Barnard who nets his 18th goal of the season.
40mins: Big chance for Saints, Bale low cross found feet of McGoldrick, but striker shot just wide.
42mins: El-Hamdaoui free-kick saved well by keeper Jones.
Half-time: Spurs 1-0 Southampton
46mins: Martin corner landed on head of Lee, but effort just over.
50mins: Saints chance - James blasts high in front of goal.
50mins: Low cross from Dutton-Black for Saints landed in front of McGoldrick whose effort swerved just wide.
55mins: Martin free-kick from edge of area well saved by Jones.
57mins: GOAL 1-1 Dutton cross met by McGoldrick, whose flick in front of goal gave Burch no chance.
60mins: McGoldrick volley from distance landed on top of the advanced Burch's net.
62mins: Sub - Simon Dawkins on for Jamie Davis.
70mins: GOAL 2-1 Barnard cross was met at the far post by a combination of El-Hamdaoui and Barcham and the ball was bundled into the net. It was awarded to El-Hamdaoui.
75mins: Burch saves bravely at the feet of McGoldrick when the striker was clean through on goal.
77mins: McGoldrick shot from distance dropped just wide.
86mins: Sub - Alex Smith for Marcel McKie.
Final score: Spurs 2, Southampton 1
Line-up: Burch, Bunjevcevic, Mills, Lee, McKie (Smith, 86), Davis (Dawkins, 62), Lewis, Barcham, Martin, El-Hamdaoui, Barnard. Subs: Forecast, Seanla, Lake.
Lee Barnard made it 14 goals in eight games and Mounir El Hamdaoui was back on the scoresheet as our reserves toppled Southampton 2-1 at Stevenage Borough on Monday night.