Oddly I wrote a whole diatribe on this piece but somehow either failed to log it properly or it has gone somewhere else. Seems technology and advancing years are not always easy bedfellows.
Anyway, no it is not IoW.S.G. or at least certainly not a production item.
It resembles the bowls we make in both 'Nightscape/Seascape and Summer Fruits ranges but these have changed now to no foot. The IoW design had a smaller rim, a slightly more shapely body (no further comment) and almost always a flat polished base.
However what I think this is, is a piece from Dillon Clark when she ran Cambridge Glassmakers. The colour and multi coloured chips lead me to this conclusion and, although I don't remember this actual item from the time I was their agent, all the other characteristics are familiar.
Thrust this is of some help.