By Guy Taylor City bigwigs and politicians seem set on using private jets to get around. Should we be up in arms or is it vital for efficiency, asks Guy Taylor Private jet use by the UK’s top businessman and political figures has, if you’ll pardon the pun, flown into the spotlight in recent months. Mike Ashley, the billionaire owner of Frasers, raised eyebrows last week after it emerged he’d upped his spending on private jet and helicopter flights. My colleague Elliot Gulliver-Needham and I have spent many hours combing through Flightradar24 data, covering every private jet flight from London …