Swindon will meet Chesterfield in the Johnstone's Paint Trophy final at Wembley after beating Barnet 1-0 at The County Ground.
After a 1-1 draw in the first leg, the home side made their numerical advantage count after 17 minutes - with Barnet's Mark Hughes off the field receiving treatment - as Alan Connell found space to meet a perfect delivery from Paul Caddis.
The Robins had chances to extend their lead before the break, with Barnet goalkeeper Dean Brill on hand to deny close-range efforts from Raffaele De Vita and Paul Benson.
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