The Schiller S1-C Water Bike is an extraordinary machine. Think premium bike meets ultra portable catamaran. Safe and stable in open water; you can jump straight on the bike, no training needed. No helmets, no paddles and no limits to exploring. It can even go in reverse. Over the August Bank Holiday weekend the Extreme Sailing Series™, now in its 12th year, arrives in Cardiff Bay and will be the headline act of the Cardiff Harbour Festival. From 24th–27th August…