LONDON — Weak demand for sweeteners and industrial starches in the Americas contributed to pre-tax profit that will be "marginally below" the company’s guidance, Tate & Lyle P.L.C. said in a April 2 trading statement for the full year ended March 31. The company did note that earnings per share are expected to be "broadly in line with market expectations" when full-year results are announced on May 28. Tate & Lyle said results within its Food & Industrial, Americas, unit improved over the previous quarter as orders from most food and beverage customers began to return to more normal levels.