Underlying revenue increased 5.7 percent, London and Rotterdam-based Unilever said Thursday, the best growth in almost three years and well above the 4 percent median analyst estimate. Growth accelerated from the second quarter’s 2.9 percent, boosted by the hottest European summer on record. It now expects full-year sales “towards the upper end” of a 2 percent to 4 percent range. The shares rose as much as 3.8 percent in early London trading.