©  licensed to London News Pictures. 01/07/2011. Gravesend, Kent. Richard Hammond  damages the roof of a house with a harpoon. Jeremy Clarkson breaks the the water mains with the remote controls of the Armtrac tank type vechicle. Top Gear presenters Jeremy Clarkson, James May and Richard Hammond smashing up old houses in Gravesend, Kent with tanks during filming for Top Gear today (01/07/2011). See special instructions. Photo credit Grant Falvey/LNP.