Thanks for your reply, I managed to get it to work using the tip in the post from mrpilot2
This alternative option is a really quick and easy fix. Simply add the following to your wp-config.php file (the comment line is optional). I add it fairly near the top after the intro comment in that file. The form works a treat even with the file upload feature.
// ** Turn off JS for Contact Form 7 ** //
define('WPCF7_LOAD_JS', false);
