Given the family's claim (Vaickuviene and others v J Sainsbury plc) has been brought under the UK-wide Protection from Harassment Act 1997 (PHA) it could have HR implications on both sides of the border.
M&S said "hundreds of prices" had been lowered and will be independently checked by Brandview.co.uk to ensure they are competitive with rivals, particularly with J Sainsbury's (SBRY.L) "basics" and Waitrose's JLP.UL "essentials" own-brand value ranges.
The riposte from Mr Hague is aimed squarely at critics including Justin King, the chief executive of Sainsbury's, who last week accused the government of having a lack of coherent measures to boost economic growth in the Queen's speech.
Kerry Group has launched its Richmond brand, best known for sausages, into the cooked ham category in the UK. The Irish food maker claimed the product was the UK's fist cooked ham made with 100% natural ingredients.