hi Sav,
i think i got 2 messages and it seems they both are form your side. Regarding the 3rd edition thing i am not too sure but i am sure that the change which came after 15th of september was they have stopped Edition 1. So from now onwards the Second edition is the one everybody needs to prepare from. Regarding the "Official home office book- Life in UK", you can find from any recognised Book stores or even form amazon if you haven't got one or even you can read from this site itself from the study material as it's the same.
I prepared from the new version (LIFE IN UK, 2nd Edition). Don't worry you will be fine, it's not going to be tough, the only thing is you will need to revise it everyday atleast for half an hour (or depending on your pace) and read the questions fully when you appear for the exams,when you appear for them.
I can asure you that my mom is going to appear next month and she is not that good with english but still she has managed to answer the questions correctly when i make her to do from the site, it's just you need to keep in touch with the material everday....and just go for it.
Best of luck....if any concerns you are welcome to mail me up.
KB