From Monday (March 21), free range eggs will no longer be available in supermarkets. This comes after an outbreak of bird flu, which means that farmers had to move all their chickens indoors.
Article source: https://www.huffingtonpost.co.uk/entry/why-free-range-eggs-are-coming-off-supermarket-shelves-today_uk_6238504ee4b0f1e82c4bf529