With Jonathan Nossiter, Lasdun co-wrote the film "Sunday" in 1997, based on his story , winning both the Best Feature Award and the Waldo Salt Best Screenplay Award at Sundance. Together they also wrote the next Nossiter film "Signs and Wonders" in 2000, starring Charlotte Rampling and Stellan Skarsgard, selected for the official selection of the 50th Berlin International Film Festival in 2000.