Prime Minister Gordon Brown has announced plans to protect Britain's airports, stations, shopping centres and sporting venues against attack by terrorists.
Mr Brown was launching a report by security minister Lord West which sets out proposals to build anti-terror measures into the design of buildings where people gather in large numbers, following June's attempts to attack a crowded London street and an airport terminal in Glasgow.
Speaking in the House of Commons, Mr Brown said that the events of June showed that Britain needed not just military and security counter-terrorism measures, but also efforts to win the hearts and minds of the Muslim community and ensure young people do not fall under the influence of extremists.
He announced the creation of a new unit bringing together police and security intelligence to look not only at the "inner circle" of extremists but also at those at risk of falling under their influence.
In a statement to the House, Mr Brown said that no "major failures in our protective security" had been uncovered by Lord West's report. But he said that improved security would be installed at the country's 250 busiest railway stations, as well as airports, ports and more than 100 other sensitive locations.
Guidance is being sent to thousands of cinemas, theatres, restaurants, hotels, sporting venues and commercial centres, as well as all hospitals, schools and places of worship to advise them on how to keep visitors safe against terrorism.
And companies responsible for crowded places will be given updated advice on how they can improve measures to prevent attack.