A broadcast from Uganda today indicated that 19 Britons had carried President Idi Amin on their shoulders for 11 1/2 miles, from his residence to a conference center.

In a live broadcast of the government's annual budget presentation, Amin said: "I think you have heard I was being carried at 258 pounds by 19 people who managed to carry me 11 1/2 miles, and they were very tired."

The government radio had said earlier that the Britons would carry Amin 25 miles to show their solidarity with the people of Uganda.

In his speech, monitored here, Amin said that despite the condemnation of his government by Commonwealth meeting in London, Ugandans should not mistreat the 300 Britons still living in Uganda.

"You must be very good to them," Amin said. "Anybody who is playing with the British nationals in Uganda is heading for trouble with me."

Britain closed its embassy in Kampala last year, and Britain announced today that it would sever its last remaining diplomatic link with its former African colony, closing the two-man British-interests section at the French embassy in Kampala.

Like Radio Uganda broadcast made no reference to the Tish announcement.

During the Commonwealth conference in London, Uganda imposed restrictions on its resident Britons, preventing them from leaving Uganda or gathering in groups of more than he would not be permitted to attend the Commonwealth meeting.

British-born businessman Robert Scanlon, 44, was arresting last week on spying charges. Uganda Radio said at that time that if he was found guilty he would be executed by the end of this week.

No mention of Scalon was made in today's broadcast.

Scanlon was one of several men who carried Amin shoulder-high to the same Kampala conference center for a summit meeting of the Organization of African Unity in 1975.

A spokesman of Uganda's Information Ministry denied rumors spread in London's commodity market that there had been a coup or attempted coup against Amin.