It took me ages to twig that if you cut down too much the weight loss actually stops. I assume it's to do with your metabolism going into famine mode.
I wish I knew how this can be counteracted. I desperately need to lose another half stone but correct eating won't work. If I eat a crumb of food I shouldn't weight goes on. Exercise does not work as I can do a 40 mile cycle followed by a 4 mile walk without eating anything wrong and, if anything, weight goes on. The adage eat less and exercise more does not work for those of us with apparently non-existent metabolism. Maybe someone has pearls of wisdom on this problem.