Yes, that is an Isle of Wight Studio Glass attenuated bottle in the Aurene colourway, a design developed by Michael Harris. Aurene was produced for eight years or so between 1974 and 1982. Yours is fairly short even for the shorter of the two sizes, the shortest I have here is 35 cm, so not that much of a difference really. The snapped off pontil mark is normal for these bottles.
Shorter attenuated bottles were also made at Kerry Glass but not in Aurene.
John