 Complete the following phrase:  When the East  West India Docks  Birmingham Junction Railway known as the North London Railway NLR from 1853 started operating on 26 September 1850, they shared a London terminus at Fenchurch Street railway station with the London and Blackwall Railway which involved a circuitous route from north London via Hackney, Bow and East Stepney for city bound passengers. An act of parliament saw the NLR apply to build a two mile extension from Dalston to a new London terminus at 