It looks like we are go now. Updated fine!
Just checked my phone too and updates successfully installed automatically (over wifi). Thanks BT for resolving this!
Out of interest, how come it was just Google Play Store not working? As far as I could tell, everything else was working fine.
So far, so good - thank you BT. I will let Google know tomorow that the fault is not at their end.
As a matter of interest, what was the issue?
Many thanks for your help.