FYI, just advertised today by Thrifty was a special offer rate of £17.50 per day all in at London Heathrow. This is another 'Lucky Dip' special offer, and you get the best available car at the time of pick-up. The good thing about Heathrow is that the minimum duration is only 3 days and not 7 like at Gatwick. So it would be £53 all in for 3 days rental best available at Heathrow!

Kind Regards,

Samuel