Ian Townend

Thanks. That seems to work for both Edge and Safari. However, there is still no response when the button is clicked on in Internet Explorer 11 (i tried disabling the popup blocker but that made no difference).

I originally had the linkage usage set and thought this might be the problem, so I cleared the field. I did not realise that it would default to 0.

However the download still does not work for me.
Using Windows Edge, I get the left hand popup, an overlaid progress wheel and then back to the left popup. I have never seen the right hand popup in your figure (possibly because this is Firefox specific?).

I tried deleting all occurrences of my email from the subscribers list but this made no difference.
I tried a different computer and user account and the result was the same
I tried using Internet Explorer 11 and the download popup does not appear (the url is given as http://www.coastalsea.uk/#unlock)

I hope this gives you a bit more to go on.