The UK should start planning as if London has won the 2012 Olympic bid, according to a joint report by the Institute for Public Policy Research (IPPR) and Demos.
The After the Gold Rush report argues that past Games have often failed to achieve the bold promises of long-term employment, social housing and increased tourism.
The report's joint author, Anthony Vigor, warned that if the London bid is successful, it risks following previous hosts in struggling to ensure a lasting legacy. Vigor said he believes that London must learn from Barcelona's 1992 experiences, which demonstrated that 'it is possible to deliver lasting benefits'.
'Claims about the long-term benefits often do not stand up to scrutiny, ' he added. 'By working together from the outset, all those involved have a real opportunity to create a sustainable legacy.'