Thousands of British Airways passengers were caught in a radiation scare last night after traces of a substance, thought to be the same that killed the former Russian spy Alexander Litvinenko, were found on two planes.
Around 33,000 passengers are believed to have flown on 221 flights across Europe since the traces were found earlier in the month.
The Government grounded one plane on Tuesday and another yesterday. A third is in Moscow awaiting tests.
Police are focusing on flights from Moscow to Heathrow Airport on Oct 25 and 31 and in the other direction on Oct 28 and Nov 3. Since then, the planes, all Boeing 767s, have flown to Barcelona, Dusseldorf, Athens, Larnaka, Madrid, Vienna, Istanbul, Frankfurt and Stockholm.