2009-03-21 Sat - The Bridges VI - West to East

I know the way from West to Central and would be willing to lead that part, from Central to East I haven't got a scooby doo.

Thinking about it what is the most eastern bridge?

tower bridge

EDIT- is it? on google earth it shows a bridge further east? the A101, but i htought it was tower bridge because that has to open so that the big ships can get through, and thats as far up as they can come?