I want to know the answer to the following question:
When did Baird cease showing its programs on BBC?
All the background I'm provided with is that "Baird Television Ltd. made Britain's first television broadcast, on 30 September 1929 from its studio in Long Acre, London, via the BBC's London transmitter, using the electromechanical system pioneered by John Logie Baird.". Is that enough to answer the question?