Reading The Nowhere Men by Michael Calvin. There is a little bit about Lascelles. (These guys call Callum Chambers probably 2 years before he hit the first team)
(Spoiled for large images of text)
Shame he won't get any kind of development here isn't it.
Sevilla have been run like that for a decade, and they have a few trophies to show for it. It can be done, but it requires to reinvest the profits of sales decisively, and to reinvest them well.
Same with Southampton really.