The Millennium Bridge was the first new bridge to be built over the Thames in London for more than 100 years. Usually, all new bridges across the Thames require an Act of Parliament to be passed. For the Millennium Bridge, that need was avoided: instead the Port of London Authority granted a licence for the structure, obtaining planning permissions from the City of London and London Borough of Southwark.
Its official title is the London Millennium Footbridge. But no-one calls it that. Instead, it’ll probably always be called the Wobbly Bridge. Around 80,000 people crossed the bridge on its opening day, with around 2,000 on the bridge at any one time. Those on the southern and central spans felt the bridge begin to sway and twist in regular oscillations. While there was no chance that the bridge actually would fall down, engineers felt that the wobble needed to be stopped.