Lower prices for Chinese sucralose led to a big drop in Tate & Lyle's profits - and the first of three profit warnings - a year ago Nearly A 400m was wiped from Tate & Lyle's stock value on Friday after it issued its third profit warning in a year. The company said it expected profits to be modestly below the A 230m-A 245m range it predicted in September - itself a downward revision of an earlier full year profit forecast of A 322m .