Mine

<VirtualHost xx.xx.xx.xx:80>
    ServerName domain.co.uk
    ServerAlias www.domain.co.uk
    DocumentRoot /var/apache/htdocs/domain
    ErrorLog "logs/domain.co.uk-error_log"
    LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" com$
    CustomLog logs/domain.co.uk-access_log "combined"

   ErrorDocument 404 /404.html
   ErrorDocument 403 /403.html
   ErrorDocument 401 /401.html
   ErrorDocument 500 /500.html

</VirtualHost>