Brexit Conservative MP Peter Bone and pro-EU campaigner Will Straw had an almighty argument on Channel 5 News.
Straw, the executive director of the Britain Stronger in Europe campaign, had suggested the EU citizens living in the UK could be sent back to the country they were born in if Britain votes to leave.
Bone was not happy. "This is outrageous," he said.
"That is the sort of lie that will destroy your campaign," he told Straw. "There is absolutely no suggestion that people who are here will be sent home and you should withdraw that remark now."