Starting over - advice and guidance sought

Ok so I used to train a lot and was in fantastic shape but I let things slip for quite a while and decided about 8 weeks ago to really get back into things and get as fit as I possibly can.
 
I would appreciate peoples advice on my diet, training and supplements and any general advice:-
 
Diet
 
am - weetebix/porridge with 75g 80% whey added in with semi skimmed milk/water
mid morning - fruit
lunch - tuna with mayonaise and water biscuits or crispbreads
dinner - usually chicken with pasta or potatoes, something along those lines
 
Training - Tuesdays/Saturdays/Sundays - I always do 40 mines on "treadles" which is like a cross trainer meets a treadmill usually burning about 650 calories.
 
On Saturdays I do chest, back, shoulders.  Sundays I do legs and arms and on Tuesdays I do solid cardio and swimming.
 
Supplementation in addition to my diet is 3CEE on non training days and 3CEE prior to with another 3 post training.  I have 75g of whey protein each day and 150g on workout days in addition to diet.
 
Pre training I weighted 11 stone and had bitch tits and 8 weeks on I am 11st7 having lost a great deal of fat and gained quite a decent amount of muscle.
 
Any tips, training routines or diet assistance would be appreciated.  I am busy and dont have time to spend ages making meals.
 
I train at a JJB/DW as well which has a good range of free weights and equipment so any good routines would help or suggestions about my meals/switching workouts around.
 
Thanks
 
Rob

Anyone?

If you train on Saturday then again Sunday I'd be inclined to alter the order around to avoid overtraining muscle groups. A classic push/pull/legs split but doing push (chest, shoulders and triceps) then do pull(back,biceps) and legs on the Sunday. You also have the flexibility of doing Legs or Pull aspect on a Tuesday and can mix it around week by week.