By City A.M. Comment Desk City A.M.’s new weekly feature takes the fiercest water-cooler debates and pits two candidates head to head before delivering The Judge’s ultimate verdict. This week: after Montpellier has announced free transport passes for all, would London benefit from a fare-free bus, rail and tube system? Yes: Free buses would boost struggling high streets and help more people get back into the officeAsk anyone on an iconic London bus what makes them proud of Britain and the answer will be the same — the NHS. The principle is simple. Healthcare is so essential that you shouldn’t …