The broadcasting service said the impersonator who was interviewed appeared to be engaged in a "deliberate hoax."
Dominic Raab's announcement was one of the first major international moves by a post-Brexit Britain.
Saudi officials have denied the claims, calling them 'absurd'.
The Saudi national was killed in Istanbul after entering the consulate in Istanbul lin 2018.
'We’ve made mistakes too, right?' said Dara Khosrowshahi
Meet the key figures behind the scenes, from a journalist-turned-lobbyist to an evangelical writer, in the effort to preserve the kingdom's image after the killing.
Statements of support must become action – words by themselves are not enough, ARTICLE 19 head of protection Silvia Chocarro writes.
President claimed the Middle Eastern kingdom is a "big buyer" of US goods.
Khashoggi was killed in the Saudi Consulate in Istanbul in October.
Nothing we say or do will bring back Lyra McKee or Jamal Khashoggi, but we need to make sure the world hears us when we say attacks on journalists must end