Prehistoric Huddersfield a water world with Island City? With Direct Sea Route from own Doorstep?

New Evidence that has come to my attention Suggests that Many Hillforts may have been "Island" Cities or Towns & their defences were made to create Islands in Lakes, not unlike the Scottish Crannog houses. But entire towns. This was because of Channels Left from the ice Age. You can look at the website yourself at http://www.prehistoric-britain.co.uk I discuss Old Oswestry that sits in one such Lakeland area & It is significant that it is shaped like the Warriors Burial Site at Huddersfield. Pointing in the same alignment.