Buy from Amazon.co.uk : http://www.amazon.co.uk/gp/product/B00J2XI2PG?tag=jardineriap05-21
Polar V800 GPS Sports Watch with Heart Rate Monitor - Blue
Measures every training session 247 daily activity calories burned and HR monitoring
Tracks your speed distance and route with integrated GPS and altimeter
Get guidance while training switch between sports and Track HR while swimming
Waterproof to 30m 100ft and rechargeable battery
Allows you to plan analyse and set you training targets with the free Polar Flow app and service