By 1910 , the Kingdom of Portugal was in deep crisis : British pressure Request on Portugal 's colonies , the royal family 's expenses , the assassination Killing of the King and his heir in 1908 , changing Change religious and social views , instability of the two political parties ( Progressive and Regenerador ) , the dictatorship of João Franco , the independence movement Reforming_a_system of its most valuable colony , Brazil , and the regime 's apparent inability to adapt Cause_to_make_progress to modern times all led to Causation widespread resentment against the Monarchy .

Michael Eavis hosted the first festival , then called Pilton Festival , after seeing Perception_active an open-air Led Zeppelin concert Social_event at the 1970 Bath Festival of Blues and Progressive Music .

The festival was well received Receiving and both the promoters and the Bath Chamber of Commerce were keen to put on Placing another festival the next year , becoming the Bath Festival of Blues and Progressive Music and reinviting both many of the same acts back and other bigger names , especially from the United States .