By Graham Hiscott Breakfast rolls are helping Greggs make lots of dough… while knocking McDonald’s off top spot for early morning snacks. The bakery, better known for sausage rolls, claimed bringing forward opening times to 5am or 6am in some shops has boosted its share of all morning visits for food to 19.6%. It has used meal deals and its popular bacon roll to win a new wave of breakfast custom. Greggs chief executive Roisin Currie said: “We have been number one for a number of months. We have more consumers eating breakfast out of the home.” The Newcastle-based firm announced 25,000 workers…