I did have Gosling Stadium velodrome in Welwyn in mind but we never looked into it.
But like MK Bowl, it would probably work best when it's not windy. Very small circuits have the advantage of luggage free riding, plus I could even have spare bikes and wheels at hand with minimal support or taxi (as I can't drive myself)
I would draft if it could work. It would work on a velodrome. Everyone who tried to pace me left me behind up hills and slowed me down on the descents, jut as I predicted from the start. Hoppo was the only one who did a reasonable job of pacing me.
I did sit in on a few laps of cyclo cross training at MK Bowl, until they started winding up the pace.