Thats all good advice. I was just trying to lodge a request with my host provider. After writing down the process and having one failure, I retried and it came good. This is really strange as I have done nothing to fix it. I have feelings it might have been a Google issue and normal links to Google Photos worked fine, it was only the goo.gl short links that caused the 403 problem
I had checked my htaccess file a couple of days ago and it looked OK
Thanks for the advice