Why Britain would not seed a rival French jet-engine industry

What could Britain have offered France as a better foundation for its postwar jet-engine industry than captured German turbojet technology?

Nothing Britain would willingly transfer, because helping France build that industrial base would create competition for British jet-engine producers.

Britain had little incentive to hand France a superior foundation for an independent jet-engine industry. Relevant British technology existed, but transferring it would help create a competitor to British-owned manufacturers. Allied defense cooperation still operated within national industrial interests.