Fortnum & Mason is on track to complete the first two floors of its new-look store by the end of October.
The retailer said the £24m renovation, which began in February, would transform it into the ultimate top-up shop for food lovers.
The lower ground floor will become a fresh food hall with a strong British bias. Many of the products will be exclusively sourced from very small suppliers.
The floor is to have a market-style feel and will include a butcher's counter, a fresh bakery and wine bar. There will also be a new chef d'oeuvres range and fresh vegetable boxes.
The ground floor will now be dedicated to preserves, tea, coffee and biscuits. Total space for food and drink is being doubled to take up 25,000 sq ft of the store's total 65,000 sq ft trading space.
The store has remained open during the revamp, although work will pause for the Christmas period before starting again in January. It is due for completion by October 2007.