The Greenwich foot tunnel is a pedestrian tunnel crossing beneath the River Thames in East London, linking Greenwich (Royal Borough of Greenwich) in the south with the Isle of Dogs (London Borough of Tower Hamlets) to the north. The tunnel is currently open while refurbishment works continue on the entrance shafts and domes. The works were due to be complete by June 2011, but are now expected to be completed in 2014.
A ‘Friends of Greenwich and Woolwich Foot Tunnels’ (FOGWOFT) is to be established in September 2013.
The Wikipedia page is