The water tank is in the loft, but probably only about 2 foot higher than the shower head. Originally the plumber replaced it with a new mixer shower with a rainfall head just below the ceiling and a smaller one below which was hopeless as the tube was huge. He swapped it for a mixer with just one smaller head but the flow is still pretty crap. The airing cupboard has tons of room, and every pipe is individually labelled with what looks like a luggage label, along with a diagram in the wall