The same proportion (24%) think the British Government or security services were in some way involved in the bombings, the poll for Channel 4 News found.

Some 59% of those questioned believed the Government had not told the public the whole truth about the 2005 attacks on London's transport network.

And more than half said they felt the security services had made up evidence to convict terror suspects.

Nearly seven out of 10 thought the Muslim community bore no responsibility for the emergence of extremists willing to attack UK targets - although 58% felt the community should be doing more.

More than 60% of those polled said they were "very" or "extremely" worried that British police could shoot to kill people they suspected of being Muslim terrorists.

Some 57% were not confident they would be treated fairly if arrested in Britain and 46% felt police tactics when arresting Muslim terror suspects were racist.

But an overwhelming 80% of respondents said they had not even considered the possibility of leaving the UK on the grounds that Britain offered no future for Muslims.

The survey of 500 Muslim adults across Britain was carried out by GfK NOP.