Meet Petra.  She came to London in 1964, from the Hundred Acre Wood, straight into a city shaking off its post war incumbrance and embracing a cultural regeneration.  Still a teenager, she began acting.  Listen to the tales of her varied career which saw her perform in some of the BBC's longest running flagship shows, including Dr Who and Eastenders and what it was like working with Michael Caine on Get Carter.  But in respect of the future of the city, she wants to overhaul the green revolution.  This includes some pretty big plans for your back garden.