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- Empty food shelves in Sainsbury's store in Bangor, Co Down. Boris Johnson has admitted there are "teething problems" in the post-Brexit trade relationship between Great Britain and Northern Ireland as industry experts warned there could be fresh shortages on supermarket shelves.
- Freight lorries and heavy goods vehicles (HGVs) are pictured at Dublin Port in Dublin, Ireland on January 12, 2021. - Northern Ireland's supply chain is "within days of falling apart" as new post-Brexit checks stem the flow of freight into the UK province, hauliers warned on Monday. Supermarkets are "experiencing considerable difficulties" stocking shelves since the Brexit transition period ended, said Road Haulage Association (RHA) policy manager for Northern Ireland John Martin. (Photo by PAUL FAITH / AFP) (Photo by PAUL FAITH/AFP via Getty Images)
- Depleted shelves in the Donegall Place Marks and Spencer store in Belfast, as major retailers in Northern Ireland continue to experience temporary disruption while they adapt to post-Brexit arrangements. (Photo by Liam McBurney/PA Images via Getty Images)
- Depleted shelves in the Donegall Place Marks and Spencer store in Belfast, as major retailers in Northern Ireland continue to experience temporary disruption while they adapt to post-Brexit arrangements. (Photo by Liam McBurney/PA Images via Getty Images)
- Depleted shelves in the Donegall Place Marks and Spencer store in Belfast, as major retailers in Northern Ireland continue to experience temporary disruption while they adapt to post-Brexit arrangements. (Photo by Liam McBurney/PA Images via Getty Images)
- Signage indicates the direction vehicles should follow depending on the relevant paperwork for crossing to Ireland at the check-in area at Holyhead port in Anglesey, north Wales on January 02, 2021. - Britain on Friday began a new year and life outside the European Union's single market, with the first trucks crossing the Channel by ferry and rail largely reporting few difficulties despite new customs rules. (Photo by Paul ELLIS / AFP) (Photo by PAUL ELLIS/AFP via Getty Images)
- Signage welcoming motorists from the Irish Republic into Northern Ireland is pictured on the main Dublin/Belfast motorway near Newry on January 1, 2021, as Britain begins life outside the European Union. - In Northern Ireland, the border with Ireland will be closely watched to ensure movement is unrestricted - key to a 1998 peace deal that ended 30 years of violence over British rule as Britain on Friday began a new year and life outside the European Union after leaving the bloc's single market. (Photo by Paul Faith / AFP) (Photo by PAUL FAITH/AFP via Getty Images)
- NEWRY, NORTHERN IRELAND - JANUARY 01: A car crosses the border between Northern Ireland and the Republic of Ireland on January 1, 2021 in Newry, United Kingdom. January 1st 2021 marks the first day of the UK's future outside the European Union. Warrenpoint harbour is one of three point of entry locations situated in Northern Ireland along with Belfast and Larne. (Photo by Charles McQuillan/Getty Images)
- Empty food shelves in Sainsbury's store in Bangor, Co Down. Boris Johnson has admitted there are "teething problems" in the post-Brexit trade relationship between Great Britain and Northern Ireland as industry experts warned there could be fresh shortages on supermarket shelves.
- Depleted shelves are seen in a Sainsbury's supermarket at the Forestside shopping centre in Belfast, Monday, Jan. 11, 2021. The U.K.’s biggest supermarket chains warned Wednesday, Jan. 13 that food supplies in Northern Ireland face disruption because of new checks imposed by Britain’s departure from the European Union. After photos emerged showing empty shelves, the chief executives of Tesco, Sainsbury's, Asda, Iceland, Co-Op and Marks & Spencer wrote to the government saying there would be “significant disruption” unless urgent action was taken to fix an “unworkable” system. (David Young/PA via AP)
- A motorist passes an anti Brexit poster on the Irish border between Republic of Ireland and Northern Ireland, close to the village of Jonnesborough Thursday, Dec. 31, 2020. (AP Photo/Peter Morrison)