When Motown stars Martha and the Vandellas, Glasgow indie darlings Belle & Sebastian and Russian protest punk collective Pussy Riot hit the stage this summer at the Doune the Rabbit Hole festival on the Cardross estate, Alastair Orr Ewing might – just might – allow himself a few moments to kick back with a local artisan cider. Orr Ewing, 37, is the first to admit he doesn’t carve out much time for himself. As the scion of the Orr Ewing baronetcy, and the only child of Sir Archibald, 6th Baronet, 81, and Lady Orr Ewing, 76, he holds down two full-time jobs. He’s a portfolio and investor relations manager at Edinburgh-based venture capital firm Par Equity, and runs Cardross, his family’s 4,500-acre Stirlingshire estate, with an A-listed 1590s house at its heart....