World Notes BRITAIN

The three-story building near the Kent port of Deal in southeastern England housed young recruits, some only 16 years old, who were training for the famed Royal Marines marching band. Last week their music was silenced in a deafening explosion that leveled one of the barracks and rattled houses within a two- mile radius. The toll: ten dead, 22 injured. British Defense Secretary Tom King called the blast an "appalling outrage against young army bandsmen who work for charity and who have given great enjoyment to millions across the country."

The Irish Republican Army immediately claimed responsibility for the bombing. In a statement that was released in Dublin, the I.R.A. noted that British Prime Minister Margaret Thatcher had "visited occupied Ireland with a message of war when we want peace. Now we in turn have visited the Royal Marines in Kent." Two weeks ago, the Prime Minister had toured Northern Ireland and praised the Ulster Defense Regiment, calling it a "very, very, very brave group of men." The U.D.R. has been accused of leaking names of I.R.A. suspects to Protestant assassins.