Why are UK supermarkets rationing cooking oil?

Cooking oil on shelves in a Tesco store in Ashford, Surrey Photograph: Steve Parsons/PA

Cooking oil on shelves in a Tesco store in Ashford, Surrey Photograph: Steve Parsons/PA

source https://www.theguardian.com/business/2022/apr/26/uk-supermarkets-rationing-cooking-oil-tesco-morrisons-waitrose-shortages-ukraine