Fugue for the Darkening Island

In just four days, Africa, torn by the enmity of tribes and faiths, armed with international players, turned into a radioactive wasteland. Tens of millions of refugees on boats, ships and boats poured into the countries of Europe in search of salvation. In England, where the right-handed government is trying to cope with the economic crisis, refugees are meeting an ice reception. The UN, the Red Cross and other humanitarian missions are powerless. Black aliens begin to arbitrarily occupy ordinary British at home, weapons are freely walking in their hands, and now hatred blooms with magnificent color, and the bloody "we - they" ...
anti -utopia? Scenario of the near future? But this novel was written by a penetration in 1972