As it's the weekend there may not be a response for a few days. I can only assume that the device would remain locked, however I'm not sure what happens when you go to a new device.
Technical Support for your area is here: http://service.mcafee.com/faq/country.html if you click the link it takes you to the UK Online Chat which is open 24/7.
They may be able to clarify this.
Thanks. Let me try that. I'll report back to the forum when I get an answer.
Ok, good luck ;-)