Asda is limiting customers to two boxes of eggs and Lidl is allowing three, due to rising costs and bird flu. Waitrose is monitoring customer demand. The UK is facing its largest-ever bout of this highly pathogenic disease. When there is a confirmed outbreak on a poultry or egg farm, all birds in the area are destroyed. The outbreak is compounding existing shortages as producers cut back on output or leave the industry due to increased costs. Russia's invasion of Ukraine raised farmers' energy bills and the costs of chicken feed, hens and packaging. There are 36.7 million egg-laying birds nationally, but there is capacity for over 44 million. Also, retailers are not paying farmers a fair price. The price of twelve supermarket eggs has risen by 50p, but farmers only saw a price rise of 5p to 10p.