Maybe not for all, but those with more than £0.5 million in shares, bonds and ETFs may wish to take advantage of the services of Israel’s Sharegain. It says it offers the private individual the ability to emulate large financial companies and lend out their holdings. (Warning – take financial advice first.)
https://www.calcalistech.com/ctech/articles/0,7340,L-3929508,00.html