Remember that
Astute-class nuclear submarine that looked like a whale? Well, scrap that, because it really looks like a Calamari Cruiser or a Zentraedi mothership. At least, that's what people must be thinking while they watch it travelling through the roads of Britain mounted on a
gigantastic moving platform.
Source:
http://gizmodo.com/gadgets/alien-invasion/driving-a-nuclear-submarine-through-britains-roads-267230.php