He got his 5000th winner driving our horse Im The Best on Dec 17 2019. I presume Alan Parker worked it out and it wasn't going by HRA.
5000 + 24 this year + 144 (2022) + 126 (2021). 2019/2020 is where it gets murky because they changed the season length. Youd need to add up the remainder of his wins for 2019 and then 2020s. So he'd be around 5400-5500 right now