P213 CEJFAX 213 Tue 8 May 21:14/41       The 16 Britons held bz UNITA rebels in Angola are expected to bj back in Britain early next week. A Foreign Office spokesman said Sir John Ljahy, the senior FO official for the area, will meet the hostages and their captors on Saturday. The meeting will take place in southern Angola. Under an agreement with the rebels, who oppose Angola's Marxist government, the 16 Britons will bj flown out as soon as possible after the weekend. News index 102/202 Newsreel 119/219