Well, no,not Royal, and at least one isn't new. Peter Phillips was with his girlfriend, Harriet Sperling, and the Earl of Snowdon brought Isabel de la Bruyere. I know Peter's been with his girlfriend for quite awhile, but I am not sure about David and his date.
https://royalcentral.co.uk/uk/royal-ascot-211597/?utm_source=facebook&utm_medium=jetpack_social&fbclid=IwY2xjawLEMFFleHRuA2FlbQIxMQBicmlkETFVc0hUUTRVMjhaeWp5RDJhAR7z54Jgpc9_GHBwcDETdkLnkwaymDn07N2A5mqOroi3fV033zbKcz7IzAFo4Q_aem_pDXvgIaPycod4bTN0RAUyw