By Jess Jones The trope of the young American tech entrepreneur who has dropped out of education to pursue a rags-to-riches story is a familiar one. In the UK, though, there are fewer household names of those under 30 who have made big money turning a tech idea into a billion-dollar business. From what City A.M. could see, these are the UK’s three richest and youngest entrepreneurs who have managed to do it: Christian Owens, co-founder of Paddle – estimated net worth of £101mEveryone wants to turn their side hustle into a full-time business. Christian Owens lived that dream after he used Youtu…