Actor James McAvoy has nominated First Minister Alex Salmond and Alistair Darling, leader of the Better Together campaign, to take part in the ice bucket challenge.

Mr McAvoy said: "As it's the year of the referendum, I would like to nominate our political champions Alistair Darling and Alex Salmond to do their very worst".

The X-Men star said he had been nominated by Jose Mourinho.

The trend sees people doused in cold water to raise money for charity and has raised millions so far.

Footage: Vimeo