Somme, 1st Battle of the, France, 1916 -- Drama -- Videodiscs. : The trench [(DVD) videorecording] / Portman Entertainment presents with the participation of British Screen in association with the Arts Council of England and Bonaparte Films Ltd. ; A Blue PM / Skyline Films / Galatee Films co-production with the support of Canal+ ; Somme Production Ltd. ; written and directed by William Boyd ; producer, Steve Clark-Hall.