Work No. 3E—U.K.A railway (829 metres in length), for construction purposes, commencing by a junction with the railway (Work No. 1HH) at a point 110 metres south-east of the southern side of the bridge carrying the North London Line over the Midland Main Line, passing south-eastwards, then eastwards and north-eastwards under the diverted York Way (Work No. 5Q), then passing northwards and terminating by a junction with the Great Northern Suburban Line at a point 65 metres south of the southern side of the viaduct carrying the North London Line over that railway;