Just picked up a really cool gadget for just £7.50 from Tchibo, its such a cool idea when you think about it. Its basically a simple bit of electronics that detects if your floor is being flooded at night by say maybe a leaking washing machine and lets out a loud alarm sound. I bought it at once, having had a leak from our washing machine in the past that went undetected I thinks it a valuable accessory well worth the investment.