You have to be absolutely fastidious in preparing and cleaning everything.
Despite my best efforts there were some bubbles under the protector. I removed these with a combination of the application card and using the cloth. Vital that you keep the top protective plastic layer in place to protect the actual screen protector. You need to use considerable force to remove the bubbles by pressing them to the edge.
Final couple of bubbles squeezed out of edge with cloth once top protector removed and after phone had been in my pocket (i think being warm helped).
In short, a real effort to fit - But now that it is in place the result is excellent.
As this is an older phone I have now ordered a spare in case they run out.