P524ORACLE 524 Mon17 Feb C4 1712:07   UB'S RETURN UPSETS  REVISED HANSON BID Hanson Trust's hopes of having a clear run at food and drink giant Imperial have been upset by the reappearance of Sir Hector Laing's United Biscuits. UB was thought to have been ruled out of the contest following the Monopolies Commission reference of Imps agreed bid for the group. But UB has defied that move by mounting its own bid for Imperial wgrth some £300m more than the Hanson Trust offer. The £2.5bn terms attempt to head off a further reference by offering to sell off some interests if the bid succeeds. * HAVE A HOLIDAY * 580