During one of my recent trips to Indespension they gave me a copy of there new trailer manual (a bribe to keep me happy) and this is what they and the law has to say about carrying petrol.
"We discourage the carriage of petrol and recommend that boats are fueled at their destination. For leisure purposes we are advised by the Fire Service that the "Petroleum Spirit Carriage by Road Act 1957" requires that a vehicle or combination carries no more than 32 galons of petrol in addition to the towing vehicle's fuel tank. The fuel must be in securely closed metal containers with no more that 10 gallons carried in each. Plastic containers are limited to two gallons each and a maximum of two containers in any vehicles or combination".
So thats not a problem then, all our marvellous UK marina's have excellent cheap petrol for sale just waiting at our points of departure so we dont have to use petrol stations miles from launch sites. I wish.
Anyway the manual is £2 and full of really good information on trailers. It is strongly recommended for all of us mortals who can't afford £2k for a south coast marina berth. Available from an Indespension Dealer near you.