I posted this thread a week ago, the day I sent off for my first ever Passport, and I was over come by complete surprise this morning. I now have my new Passport, its took one week and not the 'Up to six weeks', which I was told could be the time it takes. So I didn't have to attend any interview after all. Looks like they haven't got the resources yet to make these interviews compulsory.
So those who said they were going to apply for a Passport, do so, you may just get yours within the week. (Using the Post Office's Check and send service, which costs £7).