Slight zoning issues:
Bath protrudes 10mm under central heating boiler.
Original ceilng light was only just outside footprint of bath, in plan.
Olde worlde fuse box was far right top corner.
Had to block up old doorway to accommodate new bath position (will rotate 90°, behind new blockwork). Whoever built the place clearly intended this to be two separate rooms but revised during construction, infilling the original privy door with red brick, behind which I'd like the washing machine (currently on the cooker socket in the kitchen above).