Here are some really good starter links for those looking for fixtures, racing results, media, and history!
Today’s Racecard – Up to the minute race info for those looking to follow the days racing
Horse Racing Results (UK) – Racing results from BBC Sport
Racing Post – The website version of the definitive horse racing newspaper.
Upcoming Fixtures – From the British Horse Racing Authority
Watch the races – ATR / Racing TV (subscriptions required for both)
Horse Racing Youtube Channels worth a watch:
Racing Post / At the Races / Racing TV / The Jockey Club
Wikipedia: Grand National / Cheltenham Festival / Royal Ascot