It does have 2 fuel tanks in the pictures. The reason is as follows.... In Holland the rules are different to in the U.K. and the fuel tank has to be mounted on the chassis rail, as too does the battery. This car has been built with 2 tanks so that the position can be altered by removing the tank which is not needed in the country it is being raced. So in Holland the fuel tank in the nerf will be removed, and the battery moved inward, when in the U.K. the other fuel tank will be used and the battery moved back to it's U.K. position.
Only 1 fuel tank will be used at a time, unless BriSCA decide to run a 24hr race, in which case he's on to a winner