A leading Scottish whisky magnate has claimed he would be open to investing in Rangers after a public call to arms from John Gilligan. GlenAllachie master distiller Billy Walker is a lifelong bluenose and one of the most experienced and well-known characters in the Scottish whisky industry. The millionaire distiller has worked with a range of distilleries for the best of 60 years and even sold his BenRiach Distillery Company to Jack Daniel’s for £285m in 2016. Now, after the ‘alarmingly disappointing’ defeat to Kilmarnock, Walker has told the Rangers Review that he would be willing to invest a…