Apparently 13.5 stone works out to about 85.7 kgs. So, he's cutting... to gain weight?
Unit conversions aside; cut out the pasta and pita. Try 170 grams of protein (based on your now weight), 170 grams of carbs and 85 grams of fat (coconut oil, olive oil, fishoil supplements). That's 2125 calories.
When that slows down (less than a pound lost per week), ditch 25 grams carbs /rinse and repeat.
Give us stats such as estimated bodyfat %, height, and your type of training. This will allow us to tailor our advice. Dieting from 20% bodyfat to 10% is different than 10% to 5%.