PTI

London, Mar 21: Days before world leaders, including Indian Prime Minister Manmohan Singh, arrive here for the G-20 summit, security officials have warned that luxury hotels in Britain are vulnerable to Mumbai-style terror attacks.

Security officials believe that the threat is at the "severe end of severe", and are concerned about the possibility of attacks by terrorists using automatic weapons on major hotels and other public buildings.

The G-20 summit is scheduled for April 2. The Mumbai attacks forced British anti-terrorism officers to watch for any increase in small arms being smuggled into the UK through ports or remote airfields where security is more lax, the 'Daily Telegraph' has reported.

Officials are also considering issuing guidance to the management of hotels, businesses and other important buildings about the security measures.

The new version of the government's six-year-old "Contest" counter-terrorism strategy is to be launched next week, which will include advice on how to protect buildings from terrorist attack.

Officials also believe that the threat of terrorism is displacing away from the capital and towards other parts of the UK.