The ESTRO Anniversary Congress in London, UK, from 8 to 12 May 2011. It will be the opportunity to foster together Radiation Oncology at the forefront of the fight against cancer. For this special event, two major conferences will be brought together: The 11th Biennial ESTRO Conference in Physics and Radiation Technology for Clinical Radiotherapy, and the GEC-ESTRO-ISIORT Europe Conference. A new conference will also be introduced: the ESTRO International Oncology Forum. The unique concept surrounding this highly educational conference is built around the state-of-the-art in radiation oncology for major tumour sites.