 This process was begun with the £35 million renovation of the Lionel Robbins Building by Sir Norman Foster to house the British Library of Political and Economic Science (BLPES), the world's largest social science library and the second largest single entity library in Britain, after the British Library at King's Cross.In 2003, LSE purchased the former Public Trustee building at 24 Kingsway, and engaged Sir Nicholas Grimshaw to redesign it into an ultra-modern educational facility at a total cost of over £45 million – increasing the size of the campus by .The New Academic Building opened for teaching in October 2008, with an official opening by Her Majesty the Queen and the Duke of Edinburgh on 5 November 2008.