B&M – Letchworth Garden City – Opening Hours & Store Details B&M Home Store, which currently occupies a unit in Plinston Retail Park, is located on Second Avenue, a 0.96 mile drive east of the centre of Letchworth Garden City (close to Sainsbury’s). The store is a wonderful addition to the local businesses of Retail and Business Park, Baldock, Jackmans Estate, Norton, Letchworth, Willian, Clothall Common and Jubilee Industrial Centre. This page will provide you with all the information you need on B&M Letchworth Garden City, including the store hours, local map, customer reviews and more important info.