Work No. 11A—U.K.A railway (1,366 metres in length) commencing by a junction with the railway (Work No. 11) at its termination, passing eastwards over the railway (Work No. 10) in tunnel, then south-eastwards on the northern side of that railway under Downs Road (Work No. 10P) and terminating by a junction with that railway at a point 290 metres south-east of the intended bridge forming part of that work;