Nathan Tella's hat-trick ensured Burnley continued their march back to the Premier League as the Sky Bet Championship leaders eased to victory at Hull.Vincent Kompany's side require just three more wins to secure promotion after a 3-1 win at the MKM Stadium.Josh Cullen started for the visitors with Michael Obafemi a second-half substitute.An even first half ended with the visitors in front when Tella struck, before a volley and a smart finish wrapped up the victory, Ozan Tufan hitting a late consolation for Hull.Sheffield United remain a distant 13 points adrift in second spot after coming from behind to win 2-1 at Sunderland.A cool finish from Paris St Germain loanee Edouard Michut - his first for the Black Cats - opened the scoring at the Stadium of Light.United, with John Egan at centre-back, would rally, though, James McAtee steering home an equaliser in first-half stoppage time before Tommy Doyle's free-kick sealed a comeback win on the hour.Luton's own promotion hopes remain intact after the Hatters secured a 1-0 victory at home to midtable Bristol City, who started with Mark Sykes at left-backThe hosts needed just four minutes to score the game's only goal to make it three wins in a row for Rob Edwards and his Hatters.Carlton Morris headed home a fine Cody Drameh cross to settle the contest in favour of Luton, who close to within a point of third-place Middlesbrough.Blackburn moved up to fifth, two points behind Luton, after seeing off 10-man Reading 2-1 at Ewood Park.Ryan Hedges' late effort proved decisive after Cesare Casadei's first senior goal had levelled Ben Brereton Diaz's opener, while Reading's night was compounded by a late rad card for Mamadou Loum.Jeff Hendrick and Shane Long both started for the