It's such an odd setup racing isn't itYeah, it was because only one 'interviewer' for the winning jockey was allowed, so Matt was the feed for everyone (even the foreign news feeds) so he was 'officially' doing the interviews on behalf of Ascot not ITV
Apart from the main host and that Francesca woman everyone else is freelance and so you see them on Sky and ITV Racing at the drop of a hat.