Marks & Spencer say customs checks means 20% of products are not available in Irish stores

M&S sandwiches require three vet certificates to get them into Ireland 

A haulage truck operated by Marks & Spencer. Such vehicles entering Ireland can require up to 720 pages of documentation. File Picture: Bloomberg

Marks & Spencer has hit out at the bureaucracy required to adhere to post-Brexit rules between Ireland the UK which means 20% of its product range cannot get into the country.

The British retail giant said mammoth paperwork must be completed for every truck that enters the Republic of Ireland and that a simple error on one page means that truck could be delayed by up to 48 hours with some of the contents having to be destroyed.