Canary Wharf station is a jewel in the crown of the Jubilee Line Extension. Its vast scale and stunning architecture are simply breathtaking-but entirely appropriate for the fast-expanding financial centre that it now serves in London's Docklands. After all, the station is one of the main reasons for the line being built. But construction of a 290 m long, 27 m deep underground box in the middle of a dock surrounded by stop-start office developments was never going to be easy. As this paper explains, a major redesign was needed just as the work started and, despite round-the-clock working, led to it taking 6 rather than 41/2 years to finish.