For the sanitary ware go with wall-hung or standard close-coupled toilet and basin with pedestal with acute angles and a contemporary design. Abstract towel rails and wenge wall-hung furniture fit well in the fantasy bathroom giving it that calm almost surreal look.
Today thanks to advanced plumbing and modern technology the bathroom may well have evolved as far as it can. With luxury steam rooms and hydrotherapy baths it's difficult to imagine how bathrooms could get any more sophisticated. That said the bathroom like any room in the house is ever changing in terms of design trends.
Check floral or plaid curtains are preferred over roller blinds and shutters though rare in England offer a great form of privacy as well as adding to the country effect. Wood plays a big part in this look and almost all furniture works well in this setting especially beech maple ash and oak vanity units and cabinets.