Sebastian was the most amazing person. He was a fantastic husband, father, son and brother. There won't be a moment that goes by where we won't think of him.
We are so proud of Sebastian for all he achieved in his life. He was taken away from us too early and in the most tragic circumstances.
We will always love him, he will be forever in our hearts and eternally missed.
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.