Where was Billy Liar filmed?
1963 film by John Schlesinger
Billy Liar (1963) was filmed in Bradford, 1 place named in its Wikipedia article's Production section, in the United Kingdom. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.
Places per Wikipedia's Production section
Wikipedia’s Production section names 1 place. Each links to the sentence that says so.
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Towns & cities
Bradford
England
City and largest settlement in the City of Bradford district, Yorkshire, England
“Much of the film was shot on location in Bradford.” Wikipedia