Work No. 11B—U.K.A railway (1,354 metres in length) commencing by a junction with the railway (Work No. 11) at its termination, passing south-eastwards on the southern side of the railway (Work No. 10) under Downs Road (Work No. 10P) and terminating by a junction with the railway at a point 275 metres south-east of the intended bridge forming part of that work;