Britain yesterday presented full proposals for a cease-fire in Zimbabwe-Rhodesia and called for an answer by Monday, a demand that enfuriated guerrilla leader Robert Mugabe.

"They can go to hell," he said.

"We won't entertain a deadline like that," Mugabe told a press conference after he and Patriotic Front coleader Joshua Nkomo had been given the proposals. Nkomo said there were still many issues to discuss.

The conflict came as the conference -- also attended by delegates representing Bishop Abel Muzorewa's biracial government, which announced yesterday in Salisbury that this week that it would release 1,300 political prisoners -- near the end of its 11th week.

British Foreign Secretarey Lord Carrington, presiding over the conference seeking a formula to give legal independence to the breakaway British colony, said one reason for his haste in demanding a reply from Patriotic Front leaders is the increasing tension between Zimbabwe-Rhodesia and Zambia, where the war is spilling over across the shared border.

In Lusaka, Zambian President Kenneth Kaunda called the British "great apes" during an emotional speech in which he told a crowd of more than 6,000 that he could not accept that the British government had no prior knowledge of the recent wave of Zimbabwe-Rhodesian attacks on economic targets in Zambia.

He said Britain was using the raids to force Zambia to pressure the Patriotic Front to make further concessions at the London cease-fire negotiations. He said he refused to do this.