The good news is because your home page is collecting data the number of clicks to the "Request a repair" page [http://www.spectrum-online.co.uk/keyfax32/main.asp?co=KFRDROL_WCHA] should be present in Google Analytics becuase you have tags on your home page.
I would recommend adding GA tags to the submit a repair request page as well as establishing a goal conversion on this page to determine the effectiveness of this page.
You may improve user experience by launching the repair request form in a modal window or by adopting the uniform look and feel from your site and apply it to the form page so that the form page can live on its own. Perhaps adding some additional contact information to this page would also improve the user experience as the user may not know what to expect when filling out this form.
I have attached a mock up a what a potential modal would look like. Let me know if I can provide additional support.