Oh!!! I just checked the page and the second time I was taken to a quite different page than the first time. The first time I had a pie-chart with Remain getting 40-45, 45-50, 50-55 et cetera. This time I just had odds to stay and leave e.g. 1/5. Jiggery pokery I reckon.
Not j-p after all. It just took the page a long time to load so I had clicked the REMAIN vote percentage button which gives more detailed information.