First there was lots of international actors in the Spanish civil war and England was probably the least important of all those.
Of course UK media like the guardian will grossly exaggerate the England importance over it.
Countries like the Soviet Union had much more importance as they were the main supporters of 1934 "Asturias' revolution" that tried to make Spain a proletarian dictatorship and URSS satellite. Stalin will influence the war removing Largo Caballero and putting his lackey Negrin as leader of the republicans.
Germany also had great influence as they considered essential not letting his enemy URSS get more power in Spain.
England and France mainly remained neutral. There were socialist, anarchist and Communist on those countries that supported republicans as well as entities that supported Nationalists.
This article try to mislead people talking about Franco as he was the leader of the revolt in Spain, but he was not. He was a very good general but totally lacking charisma over the masses and there were several people over him at the start of the revolt.
Most of those people died over the war or just were too old to leader and Franco was elected as leader four months after starting the war.