Piccadilly Puller.
London Underground battery-electric locomotive 31 leads engineering train 647 into Kings Cross St Pancras Station on the Piccadilly Line, heading back to Ruislip Depot from a work site at Arnos Grove. The locomotive is one of 13 built for the Underground by Metro-Cammell in 1964-5, and is now one of the oldest locomotives in service on the Tube.
From a hint of "Bee" (NKP 765), colorful "Bees" (KCS), "Bees" w/ "attitude", to "Bees" that "sting" your eyes, in their own way they have "Bee" on display! Equipment that "Buzzes" with Yellow & Black colors! ("Bees" can still "Bee" entering this "hive"!)