In the last confirmation email you send out for an order, you have the CityLink tacking number and a link to the CityLink website.
How adding the actual URL for that tracking number.
It would just be:
http://www.city-link.co.uk/pod/podfrm.php?JobNo=<tracking id>&hidebanners=
would save me (and anyone else) having to copy the reference, click the link, click on tracking, past the reference, click search.
Yeah, I know I'm lazy