By Guy Taylor Open access trains won’t only get train nerds excited if they bring real competition to monopoly providers, writes Guy Taylor A little-known means of operating train services is offering a fresh approach to solving British rail’s ongoing struggles. The vast majority of train services are run with hefty taxpayer subsidy and an effective monopoly on services. But a growing number of so-called open access routes are being planned and the model, which prioritises commercial freedom and allows new entrants to the market, is proving a boon for companies opting to use it. Open access op…