I've got a phone interview today for a job that, for a variety of reasons I won't be able to take. Whats the best thing for me to do?? How should I go about explaining this, what should my approach be. I'm REALLY nervous about it actually!!

I should probably add -- It's due to a financial situation mainly, I cant afford the costs of moving right now (Im in Ireland & Ill have to move to England --- Im aware its not a huge move but I just cant afford it right now) & Im waiting to sit my driving test, which has a VERY long waiting list... should I say this or something else??

Thanks