£11.5m work on foot tunnels under the Thames
Renewal work on two Thames foot tunnels is due to start, with alternative crossings pinpointed to ease problems caused by the tunnels' closure.
The work, costing £11.5m, involves the closure of Greenwich and Woolwich foot tunnels, used by 1.5m people a year.
Woolwich tunnel will close in the day to be replaced by a ferry. Greenwich tunnel shuts at night, with a ferry until 1am. Both are open at weekends.
New lifts and drainage will be installed as part of the project.
The total work is estimated to take around a year, with the tunnel closure programme lasting initially for six months.
It is scheduled to start on 19 April.