Hi Verity, welcome to the forum!
Well, as you said, you have done it before, so at least you know that it is possible. Now you have the opportunty to address issues you missed before, so grab it and run! I look forward to seeing you on the forum!
35kg lost. (November 2005 - October 2006)
15kg gained again (as at October 2010).
Back to the drawing board - Let's do this thing!
"You can't change the winds, but you can change the sails"
"Reach out and take control of what lands in your lap"