Watch on Soap2day. Joni Mitchell live in concert at BBC Television Centre, London on the 3rd of September, 1970. Just five days after Joni's appearance at the Isle of Wight Festival, this full performance was originally taped for cut-down broadcast as the premier show of the "BBC In Concert" series. Featuring early hits including 'California', 'Both Sides Now', and 'Big Yellow Taxi'.