Hankook Tyre UK is sponsoring the Open Day that will take place on Friday 4 August to celebrate 20 years of the Warwickshire and Northamptonshire Air Ambulance. Entry to the event at Chester House Estate in Northamptonshire is free and it will feature stalls, activities, music and entertainment as well as a chance to get better acquainted with the service’s helicopter, provided it isn’t called out on mission.