I must say that these are the most highly regulated vessels/vehicles in the industry we have mca licence PLA and vosa to contend with and health and saftey aswell It is people who dont know about them that make these sugestions also they dont go anywhere near st pauls. try www.londonducktours .co.uk and see where they go. Also we carried roughly 80 thousand people this year. We also won the bronze award for visit london