Taken on the Millennium Footbridge on London's South Bank (one of my favourite shooting spots), I was lining up the classic shot of St Paul's between the rails when an excited tourist jumped in to the frame. I rattled off a few shots before he departed.
This was shot as part of The London Project, a long term project which, when completed will contain 1 shot from each postcode area of London. More details are on [link]. This photo is SE1.