Brentford slipped to a disappointing derby day defeat to Leyton Orient.
The east London outfit took the points in a 1-0 win thanks to a first half Scott McGleish goal.
The Bees had a lot of the ball, particularly in the second half, but found it hard to create openings against a well-drilled Orient defence.
Brentford started very slowly, the hosts were much quicker out of the blocks and although Gary Alexander had an early curling shot saved by Jamie Jones, much of the action was in the Bees' defensive third in the first 20 minutes.
Ben Hamer made a fine early save from a low McGleish shot and Matthew Spring volleyed over before Adam Chambers had a shot blocked and as Kevin O'Connor tried to clear the ball hit Alex Revell and flew just wide.
Michael Spillane headed wide and Myles Weston had a looping effort saved but Orient were playing the more incisive football and creating the better openings.
Revell forced Hamer into a scrambling save, and Pim Balkestein was forced to clear as the ball dropped loose, and 25 minutes in the hosts got the goal that had seemed imminent.
Brentford lost the ball in midfield and Charlie Daniels moved forward on the left, he had time to play the ball across the six-yard box and with no-one able to clear, McGleish slotted home.
Spillane almost diverted a Daniels into his own net and Dean Cox curled an effort narrowly wide as Orient pressed for a second.
Revell went close soon after when he turned a Stephen Dawson cross wide at the near post.
As the half wore on, Brentford began to assert their authority and ended the first half in the ascendency.
Spillane came within a whisker of an equaliser when Jones flapped at a Craig Woodman free kick and the defender headed against the post.
O'Connor shot wide, Weston forced Jones into a save and Nicky Adams fizzed a shot narrowly over as Brentford came close to levelling up before half time.
Alexander brought another save out of Jones with a curling shot soon after the re-start as Brentford continued where they left off after the break.
The game took a feisty turn early in the second period when Spillane and Dawson were booked for a coming together in the Brentford right back area - it appeared as if Dawson may have kicked out at Spillane and may have been fortunate to escape with just a caution.
The Bees were by now dominating possession, Orient were clearly nervous but few chances were being created.
Charlie MacDonald was unable to turn home as the ball pin balled around the Orient box and when Alexander escaped on the left his cross was just behind his strike partner.
At the other end, Hamer saved easily from Revell in a rare Orient foray forward.
Orient defender Ben Chorley made a superb headed clearance when it appeared as if a Weston cross would reach substitute Kirk Hudson on the far side and Alexander headed wide from another ball from the speedy wide man soon after.
Orient were limited to breakaways but Chorley had a header scrambled away by Hamer and Woodman and the left back made a vital tackle when McGleish looked set to get in behind.
Brentford threw on Carl Cort and Nicky Forster in the later stages and the pair almost combined to set up an equaliser.
Cort nodded a Woodman cross down but Forster fired over from eight yards.
Forster also volleyed tamely at Jones from a Weston cross soon after.
Orient should have sealed it with a late second but Jimmy Smith's shot - following great work on the right by Elliot Omozusi - was deflected wide.
It proved not to matter for the hosts, who took the points.
Leyton Orient: Jones; Omozusi, Chorley, Forbes, Daniels; Chambers (sub Smith 75 mins), Dawson Spring, Cox; McGleish, Revell
Subs (not used): Butcher, Brown, Jarvis, Cestor, Walker, M'Poku
Bookings: Omozusi (13 mins), Spring (45 mins), Dawson (51 mins)
Brentford: Hamer; Spillane (sub Forster 87 mins), Osborne, Balkestein, Woodman; Adams (sub Hudson 66 mins), O'Connor, Diagouraga, Weston; MacDonald, Alexander (sub Cort 76 mins)
Subs (not used): Lee, Legge, Bean, Wood
Bookings: Spillane (51 mins)
Attendance: 4,485 (921 Bees fans)
By Chris Wickham