Alarm bell No.1:
The Yahoo! links on that page go to Yahoo!'s US website. The links on a genuine Yahoo! UK site should go to Yahoo! UK. (The page has been created by saving the HTML from a genuine US Yahoo! page, and then modifying it).
Alarm bell No.2:
The page you link to refers to general shopping but the page it links to is only about buying vehicles. (It's been copied from a genuine car escrow site, then modified). That's inconsistent.
Alarm bells 3 to 100 (at least!):
Here's the registration information for yahoo.co.uk:
http://tinyurl.com/yazezu9
Unsurprisingly, it shows the URL as registered to Yahoo! at their US head office, using Yahoo!'s own name servers.
Now here's the registration information for help-yahoo.co.uk:
http://tinyurl.com/yadbqbs
It's registered anonymously, to a London address where the postcode doesn't even match the street name. The name servers are those of a company based in Ghana but which provides services targeted at users in Nigeria.
Chris