59-year-old Kenneth Whiteside, from Fife in Scotland, was shot dead by Algerian militants after being held captive for two days at the gas plant at In Amenas.
His captors executed him as the Algerian army moved in. He was one of a number of foreigners who were lined up and shot dead. He leaves behind a wife and two daughters who live in South Africa.
David Cameron warned that north Africa is becoming a "magnet for jihadists" as he announced help to tackle the terror threat in the region.
A British man from Aberdeenshire has spoken to ITV News about his dramatic escape from militants and his concern for some of his colleagues.
Stephen McFaul, one of dozens of hostages taken by Islamist fighters at gas plant in Algeria, is due to arrive back in Belfast later today.