Greggs says outlook uncertain after better September

British baker Greggs said on Tuesday its sales had improved in September after a slow August but cautioned the outlook was uncertain with rising COVID-19 infection rates leading to further restrictions on customers.Greggs, best known for its sausage rolls and vegan snacks, said that since reopening its full estate on July 2 like-for-like sales in company-managed shops averaged 71.2% of the 2019 level in the 12 weeks to Sept. 26.It said in the most recent four weeks of that period like-for-like s