The first Knebworth Rock Festival was held on the 20th of July featuring, amongst others, Van Morrison, The Allman Brothers, The Doobie Brothers and The Sensational Alex Harvey Band.
It was advertised as the �Bucolic Frolic� and was the first of the mega one day events held at Knebworth Park during the 1970s.
At the illegal Windsor Pop Festival on the 29th of August, hippies and police clashed. By its end, there were calls for a national enquiry, a ban on any more festivals in the park, and hundreds of people had been arrested for drug offences and breaches of the peace.
