Greggs Plc , the UK's largest bakery owner, looks set to report a 45% rise in second-half profits with a net income for the six months ending 30 December rising to £16.5m (US$24.3m). Pre-tax profits were recorded at £26.4m. Increasing demand for sandwiches and snacks in its takeaway food stores accounted for much of the increase in profits but Greggs, who also bakes and sells bread has found its market share in supermarkets cut as other manufacturers offer cheaper bread.