"The girl at Sainsbury's" newspaper advertisement

Comprises proofs of war time newspaper advertisements featuring the following slogans: "At any Sainsbury's during registration" [2 proofs for publishing in various newspapers on 26-28 June 1940?] "The Manager at Sainsbury's" [2 proofs for publishing on 2 July and 4-5 July 1940; attached is a letter from Francis Meynell of Mather & Crowther Ltd. to R.J. Sainsbury dated 28 June 1940 asking for his approval]; "The New Customer at Sainsbury's" [2 proofs for publishing on 10-12 July 1940; attached is a letter from Francis Meynell's private secretary to Alan Sainsbury dated 9 July asking for his approval]; "Sainsbury's say it again" [3 proofs for publishing on 17-19 July 1940; attached is a letter from Francis Meynell's private secretary to Alan Sainsbury dated 16 July 1940 asking for his approval]. All proofs feature the copy "Sainsbury's say: Wherever you shop, please make allowance for war-time".