This looks like an 'Angular Vase' designed by Ronald Stennett-Willson,given a code number RSW10,and made by Lemington Glass,Kings Lynn Glass or Wedgwood Glass.These were made in several colours,including a light or dark cranberry,clear(flint),shades of amethyst,blue,speckled blue(rustic),lilac and more.Some will have a Wedgwood etched mark(with or without the Portland Vase),although some do not!.They usually have a smooth,round pontil mark,although I do have one example with a flat smooth base.
Chris