EDIT: DO AS JUHANA SAYS: Make sure you have the correct htaccess files in the correct locations. They are all different. If it is as you describe, webroot is redirecting to itself redirecting to itself redirecting ...
Does your website have mod_rewrite enabled?
Create a file that contains just this:
<?php
phpinfo();
?>
and save it as phpinfo.php
in your document root (public_html
, www
or whatever)
Navigate to that page (http://www.jacksonwebservices.co.uk/phpinfo.php) and search the page for 'rewrite'. If you can't find it it's not enabled and CakePHP will not work in the default mode. See the manual for alternatives: http://book.cakephp.org/view/917/Apache-and-mod_rewrite-and-htaccess
You may need to contact your hosting to get it enabled or to find out how to do it yourself.