is it possible to use the blackwall tunnel near the o2 to cross the river after the after shows???

Maradona said:

I am not sure, but I don't think so.. it's a really long tunnel

No, I thought that, but you can't walk through it. You'll have to get a taxi

It cost about £10 - 12 to go to just the other side of it.

Maradona said:

the tunnel is always open but i dont think you can walk thru and im sure i saw a sign a few days ago saying closures for work.

maybe theres a site about it?

sorry cant be more help.

theres loads of nite buses and taxis after the aftershows so its easy to get outa there.

You wouldn't want to walk through it anyway, the fumes from all the vehicles are unbearable. There is no ventilation. You have to keep your windows rolled up!

The tunnels do not allow pedestrians, but a bus route (London Buses route 108) operates through the tunnel. When the service is not running, the nearest pedestrian crossings of the river are the Woolwich foot tunnel adjacent to the Woolwich Ferry (see above - the ferry also carries pedestrians) and the Greenwich foot tunnel about two miles (3 km) to the west; the Rotherhithe Tunnel three miles (5 km) to the west does permit pedestrians, but walking through the tunnel is not advisable due to heavy exhaust emissions and poor ventilation. However, there is Jubilee Line tube service from North Greenwich tube station (TfL) to Canning Town station on the east and Canary Wharf tube station on the west, and the Docklands Light Railway also passes underneath the Thames between Island Gardens at the southernmost point of the Isle of Dogs, and Cutty Sark in the centre of Greenwich.

If you can make it into Greenwich Town - there is a foot tunnel next to the Cutty Sark. Its the big green dome and will bring you out by Tower Hamlets.