There were just over three second-half minutes gone when Beausejour, rattled the crossbar, then seconds later was sent tumbling in the area by Andy King, with fourth official Kevin Wright (having been introduced at half-time to replace the injured Graham Salisbury) pointing to the spot and allowing Marlon King to slot home the opener.
Chris Wood’s late finish ended 10-man Leicester’s seven-match unbeaten run and handed Birmingham victory in an npower Championship encounter. The Foxes finished with 10 men as Matt Mills was dismissed.
Hughton praised Beausajour for providing the missing “spark”.
“Sometimes you need something to spark it off and I think Jean hitting the woodwork lifted the team and the crowd and we were able to go on from there and seize our opportunities,” said the Irishman.
Southampton manager Nigel Adkins insists there is no danger of his side being guilty of “showboating” after they held on to top spot with a 1-1 draw at Derby.
Theo Robinson put the Rams in front early on at Pride Park but Rickie Lambert’s 11th goal of the season earned them a point and left them two points above West Ham and Middlesbrough.
Adkins was adamant his team would not allow any sense of superiority to creep in.
“One thing you will not see is this side taking its feet off the ground,” he said. “They are a very level-headed bunch.”
Middlesbrough set a new club record by going an 11th game unbeaten from the start of the season with a 1-1 draw against Millwall at the Riverside Stadium but Tony Mowbray’s men dropped to third.
West Ham took advantage of Middlesbrough’s slip-up to go second as they hammered Blackpool 4-0 at Upton Park.
John Carew, a Sam Baldock brace and one from Jack Collison was enough for the Hammers.
Steve Cotterill begins work as Notts Forest boss today after the club lost 1-0 at Coventry.
Brighton were held 0-0 at home by Hull and Ipswich extended their unbeaten run to five matches with a 2-2 draw at Cardiff.