Buy emergency whistles online from BCH Camping UK. Buy whistles from Lifesystems and Highlander. We all know just how important a whistle is to any outdoor enthusiast. We have whistles ideal for Ten Tors or Duke of Edinbugh Awards (Marine whistle) or mountain whistle which wil give you 108 db of 'come and find me' whistle. We have plastic whistles for use at altitude - the last thing you want when you are whistling for help up in the mountains is for the whistle to stick to your lip due to te cold. Metal whistles are not a good idea at altitude.