Route 343 was included in the May 2009 sale of Travel London to Abellio London.[3][4] Abellio London successfully tendered to retain the route with a new contract commencing on 5 May 2011.[5]
In June 2010, the route was revealed to be amongst the ten worst performing in London.[6] Two additional morning peak journeys were introduced on 12 June 2010 with the intention of solving the problems; performance improved as a result, although the route continued to receive complaints.[7]
A proposal to increase the frequency of the route was announced by Transport for London in November 2010.[8]
At 08:22 on 17 March 2012, a bus on route 343 caught fire on Pepys Road, New Cross. The fire was put out by 09:20 and there were no injuries.[9]