Open House London is opening the doors of some of the capital's most famous and exciting architecture. For one weekend only, over 800 buildings, neighbourhood walks and architecture talks will be taking place across the capital's landscape. What's more, the tours are completely free, so why not view London from within the famous landmarks themselves. This tour is for Unilever House, the grade II listed building that has been transformed and given a new lease of life. This event is free, but entry is guaranteed. We need your card details to store the event information in your profile, but rest assured, we won't charge you a penny. Last entry at 4:30pm.