Just been reading about this. Very interesting. She's due to enter service in 2011 and is one of Britain's new Astute class submarines. Looks like a big fish.
Here's it's head making it's way from one workshop to another.
It makes less noise than a baby dolphin, could (with enough food), circumnavigate the planet without resurfacing, will run for 25 years on it's existing reactor without refuelling and if it's sat in the English Channel, it can detect ships leaving New York Harbour with sonar.
If you want one you'll need deep pockets though, roughly a billion pounds each.
