Haas announcing the signing of Oliver Bearman on Thursday ahead of the British Grand Prix was brilliant news for home fans at Silverstone who will have an additional driver to support next season. The 19-year-old has impressed during FP1 runouts for the team and rose to fame when he stepped in at the last minute for Carlos Sainz at the Saudi Arabian Grand Prix to score six points for Ferrari. However, it also signalled a key milestone in the Formula 1 driver’s market. After a season where every driver retained their seat on the grid – something Eddie Jordan described as scandalous at the time …