Exhibitions: the biggest shows of 2016

This year will feature Belgian maestros, subversive shallows and a load of rhubarb. Oliver Basciano and Robert Clark survey the sceneTake out your unsullied diaries and ensure your pencil is sharpened, because there is a lot to take in exhibition-wise over the coming year. John Akomfrah has been an artist respected in academic circles since co-founding the Black Audio Film Collective in 1982. He’s now set for even greater attention with two solo shows opening within a week of each other (A