Opponents of UKIP are sending hundreds of items, including bricks, to the party's Freepost address in the hope of running up a massive postal bill for the party.

The Royal Mail service enables any member of the public to send anything to an organisation with a Freepost address, with the recipient picking up the bill.

When a similar protest hit Nottinghamshire Lib Dems the police said it was not a crime to send bricks to a Freepost address.