Work starts on the main road tunnel which links Dartford, Kent with Purfleet, Essex.
Road tunnel which will link Dartford in Kent and Purfleet in Essex will relieve East London of most of its heavy traffic. TV. Overlooking the construction site on the Dartford side of the Thames. GV. VIP's entering the airlock to go underground for the inauguration ceremony. SCU. Mr George Nugent, Joint Parliamentary Secretary to the Minister of Transport, enters the lift followed by other VIP's. SV. The lift descending carrying Mr Nugent and others. Travel shot as lift descends to underground. The underground tunnel appears. LV. Part of the tunnel is seen and in the distance the rear of the boring shield. TV. People looking on as Mr Nugent performs the inauguration ceremony. SV. Mr Nugent speaking. He turns and tightens up bolts with large spanner - this being on the first ring of the cast iron tunnel lining. TV. Overlooking the river Thames, various bridges spanning it. GV. Tower Bridge. GV. The archway entrance to Blackwall Tunnel with traffic. CU. The writing above the arch reading "1897 - Blackwall Tunnel". SV. Traffic coming out of tunnel. GV. The rear of the boring shield with workmen operating. SCU. One of the workmen operating control valve on hydraulic system. GV. Camera tilts showing the front of the boring shield and cutting edge. LV. Looking down the pilot tunnel which stretches under the Thames to Purfleet, Essex. Man walks down. GV. & SCU. Engineer on telephone at the compress air control panel. SV. Workmen leaving the airlock before coming up from underground. GV. Pan showing construction site on the Dartford side and across the other side of the Thames.