stock to run on the Underground, which was partly due to the Trade Facilities Act 1921. This was a government initiative in the aftermath of the First World War to fund schemes which would create employment, particularly in the construction, steel and manufacturing industries. The Underground benefited from £5 million of investment from this source, which in addition to funding extensions to the Northern line, financed the construction of over 1,100 Standard Stock cars between 1922 and 1930. Key to Builders Preservation Several vehicles have been preserved: Key to Type The London Transport shunting locomotive L11 was converted from two Standard Stock cars in 1964. It underwent restoration in 2014 and is on static display at Epping Tube Station, there are currently plans to repaint the car from London Underground red into engineer's yellow. Four cars owned by the London Transport Museum have been formed into a four-car unit, consisting of DM 3370, DM 3693, CT 5279 and T 7296 at their Acton Depot. They are awaiting restoration. 2 cars Trailer car 5279 and Control Trailer 7296 were both in operations on the Isle of Wight as British Rail Class 485s. Several cars that were preserved have since been scrapped. DM 3209 / 7 scrapped at Acton Works 2013. DM 3690 / L130 scrapped at Acton Works 2013. DM 3701 / L135 scrapped at Acton Works 2013. DM 3706 / 2 scrapped at Acton Works 2013. T 7061 / PC850 scrapped at Acton Works 2013. T 7063 / PC851 scrapped at Acton Works 2006. T 7071 / PC855 scrapped at Acton Works 2006. T 7281 / 44 scrapped at Acton Works 2013. These vehicles were all stored in Acton Works up until the works claimed that they needed the space in which the trains were stored and without a place to be moved to and with them all being in deteriorating, poor condition, all the cars were scrapped. References Notes Bibliography Further reading External links London Transport Museum Photographic Archive 1923 Metropolitan Cammell multiple units Train-related introductions in 1923