Thanks, Smelly. 
I'm doing well at the moment because I'm on summer hols with the kids. We are too busy to be bored and it is easy to fit in time to go for a walk or to get on the exercise bike. I also rarely eat breakfast unless it is a work day so that makes it easy to keep the cals down. I've also saved a lot of money as we haven't eaten out on a whim many times in the hols when we are out and about.
When I'm back at work, I'm hoping that the good work will continue. I'm on my feet all day at work, walking around my classroom and going up and down the stairs lots of times in the day. Structure and routine will help too.
I've not lost too many lbs, but my size 16 work trousers are too loose around the waist and my more generous 14s fit (hurrah). I'll be happy if I can drop another stone in weight eventually. That puts me a size 12/14 which I am happy with.
I have about 300 for breakfast (inc milk for cuppas through the morning) and like to keep 200 for a snack in the evening once the kids are in bed. To make that work I keep my lunches low cal so I've got plenty for my evening meal (about 500 cal). It also makes me hop on the bike to earn some extra if I'm running low.
Usual work lunches are salad with lean meat or fish (200 cals). Or I have crackers and light philly. And when it is cold I like to take in soup. That, along with an apple and a cereal bar and I'm good til tea time.