Postal voting enables fraud to be carried out on an "industrial scale", a top judge has said.

Richard Mawrey QC, who tries cases of electoral fraud, told BBC Radio 4's Today programme that the current system makes election rigging "a possibility" and, in some areas, "a probability".

But Jenny Watson, chairwoman of the Electoral Commission, said there "remains a need" for postal voting.

The government said it had no plans to abolish the current system.

First broadcast on BBC Radio 4's Today programme on Tuesday 11 March.