Audi R8 or Aston V8 Vantage for £190 per day or £620 for a long weekend with £2k-£3k deposit respectively.

http://www.groupon.co.uk/deals/london-special/fusion-of-london/268273

Fusion of London have advised that pick up and drop off are in Enfield, London and there is a £75 charge for kurbing of alloys and stone chips.

Not a bad deal I’m tempted to sign up myself!