No Moore would be fine because he's been at the club for years, it's 3 years at the club before the age of 21, so generally academy players wilp always be HG Club Trained.Not sure of the rules but we need homegrown and if Moore goes on loan does that mean he is not counted as homegrown? Yang is different but apart from Kane &Skipp. who else really did well on loan to get a starting place when they came back.
If you sign a player at 18 then they only have 3 years to amass the 3 years at the club, so any loan will scupper the Club Trained status.