The Bees stopper punched a second-half corner high into the air, slipped and could only look on as the ball rolled over the line.
It was harsh on the Londoners who stood toe to toe with Aitor Karanka's table-toppers and for long spells looked the better side.
Derby lost ground on Boro after they had to settle for a 1-1 draw against Reading at the iPro Stadium
Nick Blackman made his home debut against the club he left last week and his new side went ahead through Jason Shackell's early strike
However, Daniel Williams headed the Royals level before half-time.
Burnley made the most significant impact of the night after thrashing MK Dons 5-0 to record their first away league win since October and climb up to fourth place in the table.
Joey Barton gave the Clarets the half-time lead before Sam Vokes, Andy Gray and Matt Lowton all found the back of the net
The Dons had defender Antony Kay sent off after 75 minutes and substitute George Boyd added another goal shortly afterwards.
The game between Huddersfield and struggling Charlton at the John Smith's Stadium was equally action-packed as the hosts won 5-0.
First-half goals from Mark Hudson and Nahki Wells put the Terriers en route to a third consecutive home league triumph and Jamie Paterson and substitute Duane Holmes netted in quick succession in the second half
Charlton sub Reza Ghoochannejhad was sent off after receiving two swift yellow cards before Jason Davidson struck in injury-time.
Brett Pitman's injury-time header kept Ipswich in the play-off places with a 2-1 victory over Leeds, who took the lead after only 12 seconds through Souleymane Doukara at Portman Road
Luke Chambers headed the equaliser for Mick McCarthy's men
Brighton's slump continued at Rotherham as they slipped to sixth place after a 2-0 loss
Goals from Grant Ward and Matt Derbyshire gave the Millers a much-needed win, moving them three points clear of the relegation zone, and inflicted a fourth defeat in five league games on Albion.
Bolton stayed bottom after a 3-2 defeat to Sheffield Wednesday
Wanderers twice came from behind to equalise as goals from Gary Madine and David Wheater cancelled out efforts from Fernando Forestieri and Gary Hooper, but Hooper's second of the match 13 minutes from time proved unlucky for Neil Lennon's team.
Bristol City complete the bottom three, along with Charlton, after a 2-1 home loss to Preston
Nathan Baker's own goal put the visitors ahead but Aaron Wilbraham quickly equalised, only for Greg Cunningham to head the winning goal against his old club in the 80th minute.
Wolves began life after Benik Afobe with a 3-2 success over Fulham at Molineux.
New signing Michal Zyro made an immediate impact with two early goals before Lasse Vigen Christensen pulled one back for Fulham midway through the first half
Matt Doherty restored the two-goal cushion shortly after the break and Ross McCormack responded for the visitors.
Nottingham Forest stretched their unbeaten run to eight Championship games with a 1-1 draw against Birmingham
Matt Mills cancelled out Jon Toral's opener for the Blues before Reds midfielder David Vaughan was sent off in the second half.
Jimmy Floyd Hasselbaink came within five minutes of his first win as QPR manager but had to settle for a 1-1 draw at Blackburn
Leroy Fer put Rangers in front but Hope Akpan headed the equaliser five minutes from time.
Source : PA