Original sentence: It includes extracts from the pro-BUF Daily Mail, the communist Daily Worker, other newspapers and also from the organisations involved themselves.It was a clash between the police, backing a march by the British Union of Fascists, on one side and anti-fascists including local Jewish and other people, as well as socialist, communist and other groups on the other, some of which had travelled into the area for this purpose.The B.regarded the march as a show of strength, and insisted on proceeding in spite of widespread opposition
Edited sentence: It includes extracts from the then pro-BUF Daily Mail, the communist Daily Worker, other newspapers and also from the organisations involved themselves.It was a clash between the police, trying to permit a lawful march by the British Union of Fascists, on one side and anti-fascists including local Jewish and other people, as well as socialist, communist and other groups on the other, some of which had travelled into the area for this purpose