In 1974 the London property market was in the doldrums, with draconian rent controls holding back investment. The average house price was £9787.  In this special episode, property commentator Anne Ashworth talks to Winkworth Chairman Simon Agace and his son Dominic, CEO.  They reflect on how and why the housing market, and the way estate agencies operate, have been transformed so dramatically over that period – and what could come next.