Thanks Keith
My wife and I found a ring necked decanter on Andrew Lineham's website in the same colours and at the very least a very similar pattern attributed to Joshua Hodgetts.
I am finding it a little difficult to comprehend what I may of found as I have a complete set of 6. All the same shape, very slight difference in height. The cutting on each glass also shows slight variations which I think would be normal for hand cut glasses.
I think a little more research to be done to comfirm.