The Royal Enclosure is widely regarded as the historic heart of Royal Ascot and perhaps the British Social season. Originally set aside for the running of the. Established in by King George IV, the Royal Enclosure provides, for many, the quintessential Royal Ascot experience. Access was by invitation of the King. Ascot Racecourse Limited. Ascot. Berkshire. SL5 7JX. Registration number: Ticket Sales and General Enquiries: Email: royal. enclosure @bookofraohneanmeldungspielen.review.