Contemporary styled bathroom heated towel rails are ideal for the compact bathroom, however they are generally quite small and although good for warming towels they are not so good for heating your bathroom. They can be fed by you central heating system or if not available then they can be connected to your electric by a qualified electrician. They are available in different finishes such as: (white, chrome and anthracite)
You may decide on underfloor heating (wet or electric). Clever thermostats enable this system to offer a consistent warm temperature within your bathroom. You may be best to consult your professional bathroom installer to discuss the option that is best for you?