Most of my work takes place at the edge of places: outlying parts of cities, the shoreline, the river bank. At the end of last year I completed a two-year video project about the Thames Estuary, an area which recently came under threat of being turned into an artificial island masterminded by ex-mayor of London Boris Johnson and architect Sir Norman Foster. The plans have been mothballed for the time being. My film Estuary Stories - a collage of voices, sounds, landscape and characters - is in many respects a love letter to that stretch of the river. It has always been a frontier country, evidenced by the chain of forts that still line its banks - from Martello towers against Napoleon to modernist WW2 gun emplacements. It has many connections to the great city higher upstream but yet it moves at an altogether different rhythm.