A freed hostage who appeared on Algerian state television has been identified as Darren Matthews.
He said he was "very relieved" to be out, adding: "As much as I'm glad to be out my thoughts are with colleagues that are still there at the moment."
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.