Greggs, the baker famous for its butter-laden steak bakes and creamy chicken slices is introducing a range of low-fat "healthy" pasties as it tries to keep up with increasingly calorie-conscious customers. The new healthy snacks, which shun the indulgent greasiness of flaky pastry for a more heart-friendly sourdough will hit the shelves tomorrow and come with a choice of chicken katsu or bombay potato filling. The pasties contain 9g of fat and less than 300 calories, compared to 33g of fat and over 500 calories in their traditional beef and vegetable counterpart. It was also revealed that Newcastle is the Greggs capital of the UK with more than three times as many stores as the national average. This is the equivalent of 9.9 stores for every 100,000 people in the city - the highest rate for any local authority area in the country.