There is a general Arts & Crafts theme going on in this bathroom, but this is mostly down to individual pieces of furniture, which is typical Arts & Crafts. The room itself is plain & neutral. The wall colour is not quite right for an As Cs room, but the clients wanted a 'warm' colour as it was a north facing room (& the colour picks up the warm tones in the wood).
The bath, by being set in the middle of the room, is the focal point. The elegant bath surround was given a Lutyens feel, with chunky corner columns & wooden framing. This is a bath for luxuriating in.
The large wooden mirror frame visually makes the room look much larger, a clever trick in bathrooms of any size. An Arts & Crafts style 2 seater wooden sofa helps establish the overall theme of the room. The sanitaryware itself is quite plain & functional. The room would have probably benefitted from a nice matching (the bath) vanity unit.