Work No. 23—A railway (3,835 metres in length) commencing by a junction with the railway (Work No. 8) at its termination, passing south-eastwards on the southern side of the realigned Tilbury Loop Railway (Work No. 23A) then on viaduct over that railway, then over the diverted Aveley Sewer (Work No. 23D) and under the new road (Work No. 23B(1)), then continuing over Mar Dyke and under the new road (Work No. 23C(2)), passing on the southern side of the Purfleet Bypass and terminating at a point 250 metres east of the junction of London Road, Purfleet with the Purfleet Bypass, including the said viaduct and a bridge over Mar Dyke;