52% of those surveyed said they did not know who was culpable for 9/11.

31% blamed the American administration of George W. Bush.

7% blamed Jews – and just 4% blamed al-Qaeda.

This compares with 71% of the general population who blamed al-Qaeda, with 10 per cent blaming the US, 1% blaming Jews and 16% saying they are unsure.

According to the latest UK census, which took place in 2011, there are 2.7 million Muslims in Britain, accounting for 4.8% of the total population.