Motor racing is expensive. That's no secret. But just how much money does someone need if they want to make it as a Formula 1 driver?

A glance at the current grid provides a contradictory picture. At one extreme is Aston Martin driver Lance Stroll, whose father Lawrence is a billionaire businessman who not only funded his son all the way to F1, but bought him a team in which to race.

World champion Lando Norris graduated through the ranks funded by the millions his father Adam made as a pensions trader, which made him one of the richest men in Britain.

Continue on BBC Sport.