Osterley track have let us know that as of April 1st they're going to be clamping down on discounts and will only give a discount if people can prove they're connected to the club.
You can show them your EA card to prove membership. If you haven't got one, they will accept a copy of your membership confirmation email (your payment receipt email should be ok) or even a Power of 10 profile showing you are a member of the club, so they are making this super easy for us.
Please make sure you take something along if you want the discounted rate - Osterley are very good to us and we don't want to be messing them about!