British households could save up to £300 on their annual shopping bill after Brexit because a tariff on non-EU goods will no longer apply, a Eurosceptic campaign group has said.

New Zealand lamb chops will cost around £1.45 less and Thailand prawns 36p less, according to analysis from Leave Means Leave.

The price of imported breakfast staples are also estimated to fall, with certain honeys becoming 17 per cent cheaper and peanut butter becoming 13 per cent cheaper.

Owen Paterson, the the former Tory environment secretary, uses a piece in Sunday’s Telegraph to say the average household could save £300 a year.