This was a decade of big hits as well as uncertainty and change. Productions included nudism on stage with the show ?Hair!?, a Danny La Rue extravaganza and Sid James and Barbara Windsor in ?Carry on London?. The Welsh National Opera made its debut at the theatre in 1971 and set up residence in 1977. In 1979, 80 years after the theatre opened Birmingham City Council purchased the freehold for the Hippodrome for ?50,000 from Moss Empires and leased it to Birmingham Hippodrome Theatre Trust Ltd, a new charitable trust.
Wagner?s ?Ring Cycle? of operas was first presented by Sadler?s Wells Opera in 1974.