As London has geared up to hosting the Olympic Games, the securitising of sporting spectacles has become increasingly prominent. Security concerns and responses played a critical part in the bidding process and were brought into sharp focus immediately after the host city was announced with the terrorist attack on 7/7/2005, prompting ever more detailed security plans, and quadrupling the security bill from £225 million to over £1 billion. Olympic security concerns were grafted onto a pre-existing security infrastructure, which had evolved over many years in response to the threat of Irish Republicanism and other forms of terrorism. Ongoing resilience planning has further sought to maximise the Government’s ability to respond to a range of threats and, where possible, to plan out vulnerabilities in advance. Such risk falls broadly into four main categories: terrorism, organised crime, protest and incivility, and natural hazards, with terrorism dominating debate.