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Silicon Fen, in Cambridgeshire, is a great success. Silicon Glen, in the Scottish central belt, has many empty lots. Can the government really create the next Silicon Valley in East London? Simon and Rupert find out. With an ageing population many people are at work trying to find ways to protect our elderly selves in the home, in the least invasive way possible. Simon discovers some of the innovative developments. And how Newcastle University set up the 'granny cloud' to teach children in developing countries, from their own living rooms. Producer: Lucy Lloyd.