Last week, during discussion on the European Union (Withdrawal Agreement) Bill, in the House of Commons chamber, Stephen asked Parliamentary Under-Secretary of State for Northern Ireland, Robin Walker, about post-Brexit trade checks.
The minister's answer revealed that there will be reporting requirements despite previous assurances by the Prime Minister to the contrary.
Speaking after the exchange, Stephen said: 'The Prime Minister had clearly promised no new import and export checks along the Irish Sea, but the Minister's answer reveals that this is not correct.'