Three films up for a BAFTA on Sunday are based on true events. That truth is at times stranger and more entertaining than fiction is of no surprise to acclaimed documentary producers John Battsek (One Day In September, Restrepo) and Simon Chinn (Man On Wire, Project Nim).

Between the pair of them, over the past 10 years Battsek and Chinn have not only broken new ground in documentary film-making but have scooped the lion's share of awards. And this year it seems they are also the ones to beat having collaborated on two BAFTA nominated films.

The first is 'The Imposter', a psychological thriller about a conman who poses as a missing child. The second 'Searching for Sugar Man' is also up for an Oscar and follows two South African fans as they try to unravel the mystery surrounding their musical hero Rodriguez – a folk singer who failed to make it in America and allegedly killed himself in a horrible death on stage. However unbeknown to Rodriguez who actually falls into obscurity as a construction worker, he becomes bigger than Elvis in South Africa where his lyrics inspire a generation of white South Africans to protest against apartheid in the 1970s.

These are the kinds of true tales that Chinn and Battsek bring to the big screen proving that whether fact or fiction, it is the story that counts.

Becky talks to British actress Andrea Riseborough, who is up for a Rising Star Award at the BAFTA awards in London.