London Bridges

[Birchy]

How many bridges span the River Thames, and what are their names?

[incitatus]

Within the M25 there are 24

[incitatus]

and not all of them have names....

[allen ives]

Google search (http://www.google.com)
produces pages and pages in answer to 'river thames bridges'. One interesting site is http://www.buchwald.dircon.co.uk/index.html.
I think incitata or whatever his name is, is thinking of railway bridges when he says some have no name. They all have names, although some are not well known. Try Google.