Login Error

Hi I seem to be having an issue with Chrome. We can't login, just get a refreshed blank login with a new URL of www.mysite.co.uk/perch/?r=%2Fperch%2Fcore%2Fapps%2Fcontent%2F. Can login through Safari just fine. Client is the same, no login with Chrome, fine in Firefox.

I've found a couple of other threads on the forum but they all seem to turn out as hosting or PHP session issues. Nothing has changed in the setup. We upgraded the Perch version last month but it has worked since.

Any advice would be great! It's not hosted on my server so no access to PHP debug.