Radicals flocked to the UK, attracted by Britain's toxic combination of criminally lax immigration controls, generous health, education and welfare benefits and the ability to perpetuate their views through the British veneration of the principle of free speech.
Despite 9/11, the 2005 London Tube and bus attacks and the dozens of other Islamist plots uncovered in Britain, the astounding fact is that Islamic extremist networks are still allowed to flourish in Britain, largely through the obsession of its governing class with multiculturalism and 'human rights'.
As a result, Britain remains - to its eternal shame - the biggest hub of Islamic radicalisation outside the Arab and Muslim world.
Extremists are still slipping into the country. The courts are still refusing to deport terrorists in order to protect their 'human rights' abroad.
London boasts the shameful reputation of the world's premier money-laundry for terrorism, which shelters behind a label of 'charity' that the authorities choose not to challenge.
Not only is no action taken against extremist mosques and madrassas, but many British universities have been turned into terrorism recruitment centres.
As Madness once sang, if this is madness then I'm filled with gladness.
Because totalitarian governments always label their opponents insane in the end. See soviet Russia.
Is it "Mad" Mel, or is it "Mad" Gordon, Ed, Harriet and Tony? The answer depends on whether you prefer your head in the sand or not.