It looks as though the old Ponsbourne Hotel tennis courts have been restored to their former glory and relaunched as a Padel Club - Hurrah!
From their website:
Nestled within 200 acres of ancient woodland and rolling Hertfordshire hills, Padel X at The Ponsbourne Club brings new energy to a historic estate. Featuring brand new outdoor padel courts, expert coaching, and a growing community of players, it's Hertfordshire's fresh home for padel. Just minutes from Newgate Street, yet a world away from the everyday. Looking for padel in Hertfordshire? Be part of the game at Padel X Club (no membership required!).
For more info: https://padelx.club/pages/ponsbourne-club