A bathroom is a question of where the water can go, and in Leamington the answer is complicated by the fact that the outside of the building is often protected.
On a spa era terrace the soil stack runs externally, and the elevation it runs on may be in a conservation area or on a listed building. Moving it is a consent question rather than a site decision. Behind the building line there is more freedom, which is where most relocated bathrooms end up, but on a terrace with a narrow rear elevation the options are genuinely limited and worth working out before a suite is chosen.
Floors are the second constraint, and Regency floors are their own case: long spans, joists sized by eye rather than calculation, and two centuries of notching by previous trades. Where a waste run means cutting into them we work to the permitted zones, and on a floor that has already been cut about we will strengthen rather than add to the damage.
Ventilation in a tall room needs real thought. An extractor sized for a modern bathroom will not clear a room with a three metre ceiling, and one discharging into a roof void puts the moisture straight back into a building that already struggles to dry out.
Tanking is not optional on a walk in shower. Our bathroom installations page sets out what a full refit involves.