Hi Fibreholic and welcome to the forum.
The first thing I would say is don't give up on breakfast. During the night your body reacts to the lack of food intake by creating glucose. This enters the blood stream as blood sugar, so raises your blood sugar levels. The only way this can be stopped is by eating something. If you were to not eat until lumchtime, by then your BS level would be pretty high.
There has been a huge amount of flak thrown at the Atkins diet over the years, most of it fuelled by bodies who have a vested interest in keeping you eating their high carbohydrate products! Whilst I believe that all diabetics benefit from a reduction in carbs, I personally don't think Atkins is particularly suitable for a diabetic because it discourages fruit and veg as well as the starchy carbs. We certainly don't need the starchy carbs (bread, cereals, pasta, rice, potatoes) because these give us nothing except high blood sugar levels, but fruit and vegetables are a rich source of vitamins, minerals and fibre. It is possible to reduce weight by carb reduction, without going to the extremes of Atkins, as many forum members have demonstrated.
The only implications I am aware of on metformin and gliclazide are that by losing weight you will reduce insulin resistance, which is what the metformin is primarily for, and by reducing your carb intake you will also lower your blood sugar so may need a smaller dose of gliclazide.
Hope that helps but please fire away if you have any more questions.