Hello,
thanks for the suggestion, I tried that multiple times yesterday and I have been mulling the problem over at work today and I had an idea
I checked on my other machines which email address I used as a login and it was different to the one I’d used on my new machine (which would suggest why the other admin user was able to access the public folder)
Swapped the account so they all match, rebooted and I now have full access again 
Thankyou for your help
