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Rhoper Rhodes Signatures Silhouette 500mm Plain Mirror
Design a shower over your bathtub
If you really have no other option then you can install a showerhead above your bathtub and use a shower curtain or splashguard to keep the rest of the bathroom dry. This will probably be your easiest solution, as it will take up no extra floor space. Personally I don't like this option and would prefer a separate shower.
Turn your bathroom into a wet room
Turning your whole bathroom into a wet room could be the most difficult and ambitious solution to putting a shower in your bathroom. It will most likely require extensive modifications and will probably be very expensive. It will however enable you to put your shower almost anywhere you like and even the very smallest bathrooms should have enough space. On the other hand, everything and I mean everything, in the room will get wet when you take a shower. This is an option to be considered but you should think seriously before going this route.
Install a curved quadrant shower cubicle
If you can redesign your bathroom to allow you to get even the smallest of shower cubicles in then that surely is one of your best options. The shower enclosure can be either free standing or installed along a wall or in a corner