A landmark “humorous documentary” about the late fantasy author Sir Terry Pratchett – which was partly filmed at the Bucks Free Press offices - is set to air next month.

BBC2 programme, Terry Pratchett: Back in Black, will tell his story in his own words, with comedian and Game of Thrones actor Paul Kaye voicing the Beaconsfield-born writer.

The creator of the Discworld series died on March 12 2015, eight years after being diagnosed with Alzheimer's disease.

Born in Beaconsfield and educated at John Hampden Grammar School in High Wycombe from 1959 to 1965, he went on to become a reporter at the Bucks Free Press in 1965 before making a name for himself as an author.

BBC crews descended on the Bucks Free Press offices in Station Road, Loudwater, to film parts of the new documentary in September last year.

In the scenes, Paul Kaye as Sir Terry is sat at his typewriter, surrounded by piles of papers while the BFP’s current reporters work in the background.

The film, to air on BBC Two on Saturday, February 11, will feature contributions from authors Neil Gaiman and Val McDermid.

Rob Wilkins, the writer's long-serving assistant, told the BBC they had been working on the documentary during "the last few months of Terry's life".

Wilkins said the film would follow the "trilogy" of TV documentaries Sir Terry made between 2009 and 2013.

In a statement, the BBC said the programme would show the author was "still having the last laugh".

Sir Terry wrote more than 70 books throughout his career, with more than 85 million books sold worldwide in 37 languages.