A national safety warning went out last week after shards of jagged metal were found in packs of butter sold at Tesco and other top stores. 

The 250g packs of butter, made from goat cream by St Helen's Farm in York, are sold at Sainsbury's, Waitrose, Ocado and Tesco for £2.40.

The Government's Food Standards Agency watchdog said: 'St Helen's Farm has recalled St Helen's Farm Goats Butter because it may contain small pieces of metal.

'The possible presence of metal makes this product unsafe to eat.'

All products with a best before date up to and including 13 March 2022 are affected by the recall notice.

The recall notice was issued on 20 December 2021. 

St Helen's Farm told MailOnline the problem was caused by a 'machine failure' that has now been fixed.

They said not every pack within the recall date range would have been affected, but that they had notified the Food Standards Agency out of an abundance of caution.

'The risk of contamination is very low', said a spokesperson for St Helen's Farm.

'But you will see visible pieces of metal if they are present.'

Production of St Helen's chas resumed and is being sold in supermarkets as normal.

Major supermarket chains selling the product are displaying 'point of sale notices', notifying customers about why the packs of butter have been recalled and telling them what to do if they bought the product.

The Food Standards Agency notice reads: 'Our advice to consumers - if you have bought the above product do not eat it. 

'Instead return it to the store from where it was bought for a full refund.

For more information contact St Helen's Farm on 01430 861715 or info@sthelensfarm.co.uk or visit website class="mol-para-with-font">In December 2021, the Food Standards Agency released eight recall notices, including for Marks & Spencer 'gluten-free' White Sourdough Cob - which despite its labelling contained gluten - and for Walkers Mince Pie Flavour Crisps that contained undeclared milk.