B&M – Beckton Triangle Retail Park – Opening Hours & Store Details You will find B&M Store easily accessible in Beckton Triangle Retail Park on Claps Gate Lane, about 8.39 miles east of the centre of London, in Beckton (right off Beckton Alps of A13 / Newham Way). This discount store is fittingly situated for patrons from Beckton, Silvertown, East Ham, Upton Park, Barking, Cyprus, North Woolwich and Plashet. On this page, you can find opening times, location info, direct phone and further information about B&M Beckton Triangle Retail Park.