Just having a look through the archives this morning and came across this one from Open House London last year. I'm not sure how I missed this one in the archives, oh well here it is.
I was able to take a photo of this awesome bridge due to the annual Open House London event. Basically all the buildings that are not normally open to the public open there doors for one weekend a year giving you some great photo opportunities and this was one of them.
For those who are interested in going this year you can order the book with all the buildings that are going to be open now at 2011 prices, I think its £6.50 and it will be delivered to you in August.
You wouldn't believe though how hard it was to get this photo with no one on it, naturally everyone walks on it when they see it so I patiently waited for my group to move off it, I took this and a few other photos and looked behind me with my group disappearing into the distance, whoops, I quickly followed but glad I took this photo :-)