https://skyscraperpage.com/diagrams/?countryID=133&status=15
https://en.wikipedia.org/wiki/Canada_Square
...using a simple "cut and cover" method to excavate an enormous pit 24 metres (78 ft) deep and 265 metres (869 ft) long. The first step was the lengthening of the trains from 6 to 7 cars. https://en.wikipedia.org/wiki/Canary_Wharf_tube_station
https://en.wikipedia.org/wiki/Docklands_Light_Railway 2 or 3 vehicles per trainset
https://en.wikipedia.org/wiki/Docklands_Light_Railway#Rolling_stock
The trains are formed from sets of 2 or 3 semi-permanently connected cars, the increase to 3-car trains being introduced progressively on the busiest routes in 2010, following substantial platform extension works. https://en.wikipedia.org/wiki/Docklands_Light_Railway_rolling_stock
