Football

Have no idea, will have a quick google, but the names of the u21 players who are on the verge of first team action, Pochettino is keeping an eye on, that I am aware of, are usually english/north london/herts area, we've poached a couple from other academies, but most seem to be homegrown.

edit: Spurs helpfully keep the youth teams on their website, more searching required for players out on loan..

u23's
https://www.tottenhamhotspur.com/teams/under-23/players/

under 18's
https://www.tottenhamhotspur.com/teams/under-18/players/

edit/edit

5 tottenham players out on loan

https://www.planetfootball.com/quick-reads/the-five-tottenham-players-out-on-loan-and-how-theyre-faring/

edit/edit/edit
guardian article on the spurs youth system and how the club want to keep the talented ones close to the first team

https://www.theguardian.com/football/2018/oct/23/tottenham-hotspur-academy-youth-team-bournemouth-west-ham

pertinent location quote
"Some of Spurs’ rivals recruit from far and wide, but almost all of their second string are English and the vast majority of their Under-23s are from the A10 corridor that stretches from White Hart Lane to north Hertfordshire: Spursland. They come from Hackney and Hertford, Enfield and Cheshunt, Borehamwood and Winchmore Hill. Goalkeeper Alfie Whiteman even grew up a short walk from White Hart Lane. These are local lads coming through the system at a Premier League club."