Veolia Environmental Services expects to collect about 30 tonnes of bunting, flags, banners and champagne bottles from the Jubilee River Pageant this weekend.
The waste firm has almost doubled its Westminster area maintenance team to deal with waste produced by spectators along the River Thames extravaganza.
More than one thousand boats will gather on the River Thames on Sunday 3 June to celebrate the Queen’s Diamond Jubilee.
Veolia will use 21 specialist vehicles as well as 40 brooms to clear up the debris.
Pascal Hauret, London director for municipal services at Veolia ES, said: “Our experience cleaning up after Kate and William’s big day in 2011 will stand us in good stead for the special day.”