What I originally did was change my site to show www.website ,instead of website no www.
removed
RewriteEngine On
RewriteCond %{HTTP_HOST} !^pewterworld.co.uk$ [NC]
RewriteRule ^(.*)$ http://pewterworld.co.uk/$1 [R=301,L]


debug is saying
[14-May-2014 04:43:20 Europe/London] PHP Fatal error: 1194:Table 'whos_online' is marked as crashed and should be repaired :: delete from whos_online
where time_last_click < '1400038100' in /var/www/vhosts/pewterworld.co.uk/httpdocs/includes/classes/db/mysql/query_factory.php on line 120

and unable to get into admin
site is now down completely
saying
WARNING: An Error occurred, please refresh the page and try again.

Have asked hosting to do a complete restore for me to see if that helps