The Andrew Goes Green?
I shudder to think how many acres of farmland it would take to fuel one battleship for one trip. These guys buy fuel by the ton, A trip through any rural area of England at the moment will reveal how much of our farmland is under oil seed rape, which makes me worry about how much will be left for growing food.
From a conservation point of view we do have to explore these alternative energy supplies. Maybe the Andrew (Royal Navy) might consider hoisting a sail or two when the wind is in the right direction? we could coat them with photo-voltaic cells and harness a bit of the sun as well.