It’s thought to be an offshoot of the Training ground. Specifically to house those U23 players we want to farm intensively before flogging [as in sell, not abuse] for inflated fees.
If you can get out on a week day then I’d heartily recommend the Burgess Hill 9 hole par 3. Proved An excellent proving ground for me. A couple of longer holes so you’ll always be learning something other than short game management for which this is excellent.