After an upgrade things went horribly wrong. Auto failed so did manual upgrade. All failed. Tried to restored from backup files, no luck... now I've restored my site and can log in to the admin area but each time the site directs to mysite.co.uk/wp-admin it redirects to http://mysite.co.uk/wp-admin/upgrade.php?_wp_http_referer=%2Fwp-admin%2Fcustomize.php%3Furl%3Dhttp%253A%252F%252Fmysite.co.uk%252F and I get an error on a white blank page.
I believe all the plugins were disabled before I attempted a manual upgrade (after the auto failed) but as a check I also renamed the plugins folder and created a new, empty one. No luck.
I've re-uploaded the upgrade.php file via FTP and tried numerous other suggestions that I found on forums. Now I'm all out of ideas... Please can anyone help. Thanks.
Site is a live client site so will happily email link if anyone can take a look and help...