Who were the Vorticists? Were they significant? Were they any good? And does this little-known British avant-garde movement – if it can be called anything as cohesive - really deserve a major survey at Tate Britain? Many of the group’s paintings never survived the First World War, and nor did one of its most talented supporters, the precocious French sculptor Henri Gaudier-Brzeska; two of the most talented artists who did – David Bomberg and Jacob Epstein – were never signatories to its manifesto, and Epstein, for one, distanced himself; and, in its short life, there was only one exhibition on home turf, while its journal, Blast!, survived only two issues.