Nick Smith, head of communications at Ascot, said: "We are delighted with the standard of dress we are seeing in both the royal enclosure and the grandstand. The new dress code has clearly had a positive impact on that.
He added: "We always said that we would adopt the new rules sensitively using common sense and discretion, especially in the first year of its implementation, and that is what we are doing."
More top news
Evelyn Beatriz Hernandez had been charged with homicide.
Lissie Harper had been married just four weeks before her husband died doing his job.
Scientists say the move would prevent 25% of the estimated 40 million new cases of vitamin D deficiency over the coming 90 years.