Glad your enjoying your new job.
What is it your struggling with, with doing the diet at work? I find it easier to be 100% when Im busy, its just people bringing in cakes and sweets that I struggle with.
Just remember why your doing this, if you stick to it you could be 7 stone lighter when you wear the bridesmaid dress, which will mean you will be just under 10 stone and at a healthy weight for your height! And I would guess a size 12?
Does the food make you feel as good as your feel wearing a size 12 bridesmaid dress? I wore a size 20 dress to my sisters wedding... and I HATE seeing the pictures, I cant excape them though, they will always be shown to people, I wish so much that I had discovered Exante before that wedding but I just kept trying normal diets... which I would keep putting off because "the wedding was ages away, I'll start next week/next month" it never happened and now my parents and sister have pictures of me looking a blob all over their house! Horrific!
You've proved you can do this, you just gotta keep going.