The name Grafton Morrish is derived from the name of the major trophy of the Public Schools Old Boys Golf Association (PSOBGA). There are two other trophies played for each year, these being the Solihull Salver – the trophy of the Plate competition – and the Committee Bowl – the trophy for an extension of the Plate competition. The Association is open to the golfing sections of Societies of Old Boys or Old Girls of schools the headmaster of which attends the Headmasters’ Conference and other schools which are sponsored by six members.
The competitions are amateur scratch foursomes competitions for three pairs of former pupils of the school. There is a qualifying round in May or June, on one of seven courses that reduces the number of entrants, usually between 105 and 115 – to the 48 that take part in the knock-out Finals in September or October each year at the Hunstanton G.C. in Hunstanton and the Royal West Norfolk G.C. in Brancaster.