Forest returned to winning ways in the Championship, as they staged a 2-1 comeback victory over QPR at Loftus Road.
After a goalless first half, Rangers took the lead in the 65th minute when Charlie Austin found the target from 20 yards.
Forest staged a strong comeback thereafter and equalised 10 minutes later through Lansbury.
Goalkeeper Robert Green was sent off for bringing down debutant Chris O’Grady inside the QPR penalty box, and midfielder Lansbury made no mistake from the penalty spot.
Nelson Oliveira wrapped up the points for Forest eight minutes from time with a cool finish from close range.
Over the course of the 90 minutes at Loftus Road, the Reds had 53% of the possession, took 21 shots of which seven were on target, and earned four corners.
Following the win, Forest midfielder Lansbury took to Twitter to underline the team performance against QPR:
What a team performance https://t.co/ix57zvNBc2— Henri Lansbury (@lansburyhenri) September 12, 2015