Potters Premier 1400 with Divan Set. Perfect for hotels, schools, nursing homes or anywhere requiring a higher level of fire retardancy, the Potters Premier 1400, is a BS7177 Source 5 mattress. 1400 pocket springs contour to your body, offering support where it is most needed. A durable cotton cover has cooling properties whilst a layer of wool will naturally keep your body warm. And buy this Potters Premier 1400 with Divan Set Now £1038.00.