First World War Generals tend to have dubious reputations and in group photographs of the High Command on the Western Front, one figure stands out as an archetypal Colonel Blimp - smart to a fault, white hair, white moustache, pot-belly. This was Sir Herbert Plumer.
But his appearance belies the fact that he was one of the best-performing and best-regarded officers on the Allied side. He was famously thoughtful of his men and sparing of their...