Metroline is part of the Singapore based ComfortDelgro group and operates, together with its Armchair and Thorpes subsidiaries, nearly 1200 buses in North, North West, West and Central London employing nearly 4000 staff. TE681 is one of a batch of 28 10.1metre Dennis Tridents with the striking new Enviro400 bodywork delivered to Metroline in the winter of 2005/6. Metroline was the first London bus company to place an order for vehicles to this brand new design. One of the main advantages of the new lower deck layout was an increase in the number of seats available. The buses are mainly used on the high profile Central London Route 24 running between Hampstead Heath and Pimlico.