 Galvani made a pitch to the board, which resulted in Britain's first supermarket opening in Streatham, South London in 1951 under the Premier Supermarket brand.In 1960, in an attempt to expand nationwide, Galvani made a pitch to the board to buy Irwin's 212 stores, but they refused to back him; Jack Cohen of Tesco subsequently bought the chain.In 1964, the chain was sold to Unilever's Mac Fisheries chain for £1million.