Three Studio glass Vases: Colin Heaney and Lucas Salton, circa 1992 and after, two iridescent vases by Colin Heaney, one with a veined peacock blue and purple decor, the other with a bronze gold speckled decor and random trailing motifs, one signed and dated; and a Lucas Salton lustre vase of tapering ovoid form with a spiral decor and a spreading foot, height 23.5 cm, and smaller