Quick Answer: Greggs plc is a British bakery and fast food chain. It specialises in 'on-the-go' savoury products such as baked goods, sausage rolls, sandwiches and sweet items including doughnuts and vanilla slices. It was founded, and is headquartered in, Newcastle upon Tyne, England. It is listed on the London Stock Exchange, and is a constituent of the FTSE 250 Index. Originally a high street chain, it has since entered the convenience and drive-through markets.