Support for the Conservatives has strengthened to its highest level since last October, according to a ComRes poll for the Independent on Sunday.

The rioting and looting of a fortnight ago appears to have reinforced support for the traditional party of law and order. Tory support is up two points since last month to 38 per cent, just two points behind Labour on 40 per cent. The Liberal Democrats are up one point on 11 per cent.

David Cameron's rating is hardly changed, with 34 per cent saying he is "turning out to be a good Prime Minister", while Ed Miliband has fallen three points, with just 24 per cent agreeing he is "turning out to be a good leader of the Labour Party".