Thank you for your help and I apologise for my late reply...i was on holiday.
You have been very helpful, but I am still confused about the apparent 7 year length of the PHD at Harvard.. is this usual for US? Also, would you be paid, because otherwise surely no one would do it. I would be 30 by the time I finished that course, and I would hope to have achieved some sort of income by then. Also, and I know I may be shooting in the dark asking this, but I have literally no idea what kind of candidate will get accepted into Harvard. What could I do to prepare and improve my chances? Pure intellect, wide knowledge, extra curricular, work experience, good grades... I am expecting I will get nowhere without a First for my BA so that is my number one aim.