I am trying to download the link to instal BT Virus Protect on my iPhone. In the dropdown list where I need to enter my mobile number, it is not possible to select the UK! The US seems to be the default, and when I select the UK instead, the phone country prefix does not change, so my number appears incorrect.
You'll more than likely find that Virus Protect is more trouble than it's worth. Provided you haven't Jail Broken your iPhone and if you only download apps from the App Store then there's almost no need for Virus Protection.