Nigel Clough hailed the “incredible” achievement of reaching the League Two playoff final after Mansfield’s 3-1 aggregate win over Northampton. The Stags carried a 2-1 lead from the first leg and then built on that when Stephen McLaughlin fired home 31 minutes into Wednesday’s return game at Sixfields. A gritty and determined defensive effort then saw off heavy Northampton pressure in the second half and secured Mansfield’s place at Wembley. Clough’s success has echoes of his former club Nottingham Forest’s rise from the foot of the table to Wembley this season. Mansfield were three points off the bottom of the table after losing 2-0 at Northampton in mid-October. They will play either Swindon or Port Vale on 28 May. Clough said: “It took a lot of hard work but I thought it was an incredible effort from the players over the two legs and over the last eight or nine months. “I thought we were very, very good this evening in denying the opposition too many opportunities – it was properly one of our best defensive performances all season, certainly to keep a clean sheet. “It all started at the front and I thought Jordan Bowery and Lucas Akins did their defensive duties and the team was outstanding in all areas. We were at our lowest ebb when we came here earlier in the season and we were down and out but we put in a good performance in the next game and then everything picked up from there. “When you are down at the bottom after a third of the season and then you go and reach Wembley, the players and staff deserve a huge amount of credit to turn it around. We still have a job to do at Wembley but it’s an incredible achievement.” Northampton manager, Jon Brady, was happy enough with his side’s performance but felt aggrieved by some key refereeing decisions, particularly two penalty shouts either side of half-time. He said: “I felt we played really well tonight and we dominated most of the game but our best chance probably came with Josh Eppiah’s header in the first minute or two. “Mansfield put their bodies on the line. There were loads of blocks and loads of clearances. We had a lot of entries into the final third and into their box but credit to them, they battled and worked hard. “We dominated the play in all of the stats but unfortunately we did not test their goalkeeper enough. “But I’ve been told we should have had two penalties, one in the first half on Fraser Horsfall which the referee’s assessor has almost apologised for, and then the one on Louis Appéré which is a foul in the box.” The Cobblers started with lots of energy but Mansfield did well to ride out the early storm. And the Stags took a giant stride towards Wembley just past the half-hour mark when Elliott Hewitt latched on to a through pass and squared for McLaughlin, who fired a low first-time shot past the sprawling Liam Roberts. Northampton responded with a brief flurry of pressure and Horsfall was adamant he should have won a penalty after being bundled to the floor but nothing was given before Sam Hoskins blazed over. Appéré saw another strong shout for a spot-kick turned down early in the second half but Mansfield stood firm and soaked up plenty of Northampton pressure. Hoskins fired in a shot that was well blocked and the visitors continued to put their bodies on the line all the way to full time to secure a place in the playoff final a week on Saturday.