Alan,
Cheers for that mate, have just asked him, will let you know what he says, something I wanted to ask you was, my 7 series has BMW online but the subscription has run out, how much does a new subscription cost?
Del 
It's free for the first three years and then it's £120 annually for bmw connecteddrive. As I replace mine yearly I've never had to pay for it seperately. It would come in handy at a time like this because you could phone up assist and use the ' I can't remember where I parked' function and they would tell you.

EDIT: BMW can trigger the tracker as part of bmw connecteddrive, (see note below).
The link below is for registration:
http://www.bmw.co.uk/bmwuk/connecteddrive/0,,___,00.html?siteID=1312Extract from their online page:
BMW ConnectedDrive - The valuable connection in case of theft.
With its integrated module and dedicated services, BMW Tracking keeps you connected to your vehicle should it become stolen. This service informs you when the alarm is activated and connects you with the BMW Tracking Call Centre staff for assistance.
In the event of a theft, the tracking module can be activated. It then sends a GSM signal - only with your consent - so that the vehicle can be located and recovered
Regards
Alan