One aspect of the terrible atrocity committed on New York is so ironic. Under its highly-effective elected mayor, Rudolph Giuliani, the city has achieved a remarkable transformation from a city of crime to one of the safest in the world. The safety of citizens there has now been threatened, not by an enemy within but one from without.

And, presumably, we can expect the key supporter of the No campaign, former councillor Richard Stanton, not just to carry on denying the effectiveness of mayors, including Mr Giuliani, but also, presumably, to say this terrible attack is a justifiable act of terrorism, in the same way he defended the IRA bomb on The Grand in Brighton. Beware the No campaign. It is supported by extremists.

-Alan Bacon, Reigate Road, Brighton