By cphillips@thekmgroup.co.uk (Charlotte Phillips) A Marks and Spencer has welcomed a new Mamas & Papas store inside it. The Bluewater shop is now one of three to home the nursery brand, making it one of the first nationwide. The shop opened on Friday, and there are over 700 products on offer, including pushchairs, car seats and nursery furniture. There are be in-store services such as one-to-one personal shopping appointments and car seat consultations and fittings. The new 1,485 square foot “shop-in-shops” are part of a trial designed to deliver a bigger and better shopping experience for fa…