Frank Horwitz, by his own acclaim, “plays a ‘mean’ guitar”. And with his laid-back manner, trademark dark shirt – and a certain passing resemblance to Anglo-Irish singer Chris de Burgh – it is not hard to imagine him fronting the comeback tour of a 1970s rock group. His regeneration this year is arguably more mundane, however. In April, Prof Horwitz, 55, became dean at Cranfield, one of the UK’s most established business schools, after 23 years at the University of Cape Town, latterly as dean.