Ahead of the chain s opening tomorrow, here is what we know so far: What time does it open? If you are desperate to visit, you don t have to wait long. The store will open its doors for the first time on Saturday morning (March 27) at 8am. Where is it? B&M s new store is based next to Sainsbury s in Hatch Warren and occupying the former home of Mothercare. Or if you need an address to pop into your SatNav, it s on Wallop Drive. The chain already has a store on Thorneycroft Industrial Estate next to Morrisons, off Worting Road. What is B&M?