Gog Magog - has two courses the Old and the Wandlebury (which is longer and built to modern standards) Robin - did you work on this and never been back since then?? The Old has more interesting and challenging greens compared to the Wandlebury flatter greens.
Both courses have held national events - the Old is the host for the annual Lagonda Trophy and the Wandlebury has been used for Open local qualifying. They are quality courses in their own regard.
Celtic Manor and the Belfry are another however I will not go any further about them