Currently I have no ring main electrics in the bathroom. It is too small for "Outside area" for electrics (i.e. only has zone 2). I have a ring main (30mA RCD fused) socket just outside the bathroom where I could get a spur fitted to go through the wall into zone 2 and take a channel up the wall to a new shaver unit. Is this permitted given that the bathroom floor space is only 1.8m square next to the bath?