It may be the subject of a complex and bitter multi-million euro legal battle, but John Magnier’s reasons for wanting to buy the Barne Estate in Co Tipperary could not have been stated more simply in court. It adjoins his land on either side. “It is a very good farm and right beside where we operate from. It would be obvious for us to be interested in it,” the bloodstock tycoon told the High Court. “I grew up as a farmer and really like farming,” he told his senior counsel Paul Gallagher. The 77-year-old billionaire took to the stand just…