If you've driven to Heathrow Airport recently, or wandered through any of the terminals, I am sure you will have seen the myriad of signs for "Heathrow Rewards". They are everywhere! Heathrow Rewards are yet another loyalty programme where you can collect points almost every time you spend at the airport – from shopping and dining to parking and currency exchange – and turn them into discounts, vouchers and even airline miles. Yeah, I bet that last one caught your interest! H