Congratulations on the move 👍
Since the water tank is being removed, that’s a great opportunity to properly reconfigure the space rather than just replacing fittings in the same positions.
If you’d like to keep both a separate bath and a larger walk-in shower, I’d suggest:
Option 1 – Feature Walk-In Layout
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Position the bath along the longest wall to create a focal point.
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Use the freed-up cupboard space to extend the shower into a full-width walk-in (1200–1400mm if space allows).
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Install a fixed glass panel instead of an enclosure to keep it feeling open.
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Consider a recessed niche for storage rather than external shelves.
Option 2 – Zoned Layout
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Create a “wet zone” by placing the shower at the end of the room.
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Keep the bath opposite or under the window (if privacy allows).
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Use a wall-hung vanity to visually open up the floor space.
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Relocate the radiator to a vertical towel rail to free wall area.
With modern bathrooms, layout and flow matter more than the actual fixtures. Removing the tank means you can improve both circulation and storage at the same time.
If you share the dimensions, it would be easier to suggest a more precise configuration.