Joe Mason’s goal in the 41st minute was enough to give Malky Mackay’s side all three points as the Welsh side further stretched their lead over second-placed Hull City.
It was a frustrating day for Hull City as they were held to a goalless draw at Blackpool’s Bloomfield Road and lost ground on the league leaders.
Crystal Palace leapfrogged Middlesbrough into third place with a 3-1 win over out-of-form Wolves at Selhurst Park.
Ian Holloway’s side brushed Wolves aside despite Sylvan Ebanks-Blake’s late strike as a brace from Andre Moritz and a goal from Yannick Bolasie secured the points.
Middlesbrough suffered a surprise 3-1 defeat to Derby County at Pride Park as Jeff Hendrick, Conor Sammon and Michael Jacobs were all on target. Lukas Jutkiewicz netted a stoppage-time consolation strike.
Leicester City were the big winners of the day as they thrashed Huddersfield Town 6-1 at the Walkers Stadium, with Chris Wood and Anthony Knockaert scoring braces with additional goals from Ritchie de Laet and Martyn Waghorn.
Millwall put pressure on the play-off spots with a 2-1 home win over Bristol City after goals from Dany N’Guessan and defender Adam Smith, with Jonathan Stead’s effort proving irrelevant for the visitors.
Leeds were also winners at home as Neil Warnock’s side pipped Bolton courtesy of Luciano Becchio’s 66th minute penalty.
Brighton were 3-0 winners over Mick McCarthy’s previously in-form Ipswich Town at Portman Road, with Dean Hammond, Craig Mackail-Smith and Wayne Bridge all on target.
It was not such a good day for Nottingham Forest, however, as Alex McLeish’s side suffered a 3-0 defeat away at Blackburn Rovers with Ruben Rochina, Jordan Rhodes and Colin Kazim-Richards all on the scoresheet.
Burnley moved up to 12th with a 2-0 win as they ended Sheffield Wednesday's good run with Ross Wallace and Keith Treacy both scoring at Hillsborough.
In the day's early game, Johnnie Jackson grabbed a late winner as Charlton twice came from behind to beat in-form Watford 4-3 at Vicarage Road.
Finally, Peterborough moved out of the relegation zone at Wednesday’s expense with a 2-1 win over bottom-of-the-table Barnsley, with Tommy Rowe and Michael Bostwick scoring for Posh. Marlon Harewood netted for the managerless Tykes.