Hi LC and welcome!
I love to eat, hungry or not, so I do really understand where you're coming from.
You're not going to like what I say next, but I think trying to lose 3 stone in 3 months is a bad idea. Why? Because you're setting yourself up for a fall. And failure is something that often triggers eating. So rather than the time limit, set yourself a goal and get there when you can, it's much more likely to be forever that way
As for diet plans, I'm useless! I just eat what I perceive to to be a good diet until I fall off the rails and have to climb back on again (happening more at the moment but I'm still determined to get to my goal one day!)
My philosophy is, if I can't do it for the rest of my life, what's the point?
I'm not disciplined enough to count calories/points/syns forever, or to cut out food groups or whatever.
So, I've become more aware, I read packets a lot. I've cur out my calories from drinks, I only have water or black coffee, unless I go out and have alcohol.
I try not to eat processed food (but do have ready meals sometimes) Try not to eat crisps or pastry. moderate choccie and sweets and pizza. But they're choices we all know to make!
Good luck, keep posting here, and I'm sure otehrs will have much better plan advice!