Commonwealth summit: can Britain still shape the world post-Brexit?

International trade is firmly on the agenda as the group of 53 disparate nations meet in LondonAny 80-year-old institution based on the contours of a defunct 19th-century empire and largely held together by the charming drive of a 91-year-old woman is going to struggle to prove its modern relevance. Described once in the New Statesman by James Fenton as “one of the world’s least obnoxious institutions”, the Commonwealth can probably only ever aspire to faint praise. In an alrea