Tanita Health and Beauty
Tanita Body Fat and Water Monitor Scales for £24.99, I paid little more than this when I was looking last time.
Info from Site
This body fat and water monitor includes a number of great features and is ideally suited to individuals who want to see a complete in-depth picture of their inner health. The technology used on the home use body fat monitor is based on the same advanced technology found in our professional analysers and is widely used by doctors, medical centres and by professional athletic teams, fitness clubs and personal trainers around the world.