An Edwardian silver Drew's Patent and Registered "En Route" Picnic basket

An Edwardian silver Drew's Patent and Registered "En Route" Picnic basket, the silver pieces with maker's mark of Drew and Sons, London 1902, comprising two silver sandwich boxes of rectangular form, hinged covers with ring handles, a kettle with a silver pierced tea strainer and holder, wicker-bound handle, with an electroplated stand and burner and spirit holder, plus four enamel sandwich plates, four ceramic cups and saucers and three later spoons, in a fitted wicker basket, with leather straps and initialled 'W', the hinged front opens down to reveal an electroplated tray, the hinged cover with instructions and how to attached the basket to the door of a railway carriage, approx. weighable 61oz.