Geri Halliwell is back by Christian Horner’s side on race day at the Saudi Arabian Grand Prix in the latest sign she will stand by her husband amid the ongoing saga. The Spice Girl singer made her first public appearance since the allegations were made against Horner at last week’s season-opening race in Bahrain. The couple held hands and then shared a kiss at the Bahrain International Circuit to show their unity. The Red Bull team principal was cleared of any wrongdoing after being accused of ‘inappropriate behaviour’ by a female employee within the team. But the scandal has taken several twi…