A bathroom is mostly a question of where the water can go, and in Coventry the answer depends on whether the front of your house is protected.
On a modern house the soil stack is internal and moving a bathroom is straightforward. On the older terraces it is on an outside wall, and if that wall faces the street inside a conservation area or under one of the city’s Article 4 directions, then altering it is a conversation with the council rather than a decision on site. Behind the building line there is far more freedom, which is why most of the bathrooms we move end up at the back of the house.
Floors are the second constraint. Older upstairs joists were sized for a bedroom, not for a filled bath on a tiled floor. Where a waste run means notching or drilling them there are permitted zones, and the wrong cut in the wrong place is common and serious. We will move a fitting a foot rather than cut a joist where it must not be cut.
Ventilation gets treated as an afterthought and causes years of trouble afterwards. An extractor discharging into a roof void puts the moisture straight back into the building. We duct it outside.
Tanking is not optional on a walk in shower. Tiles and grout are not a waterproof layer and never were, so the wet area gets tanked properly. Our bathroom installations page sets out what a full refit involves.