A church service is being held today to remember Alan Henning, the British taxi driver killed by Islamic State militants.
The special service will take place in Mr Henning's home town of Eccles in Greater Manchester this evening and organisers say it will mark his life and the good he did.
It comes after Mr Henning's family paid tribute to a "decent, caring human being" after he was murdered.
In a statement they thanked those who campaigned for his release, saying they had comfort "knowing how many people stood beside us in hoping for the best".
"There are few words to describe how we feel at this moment. Myself, Lucy and Adam, and all of Alan's family and friends are numb with grief," the statement said.
Video: Friend Describes Henning Kidnapping
Support from the Government, Foreign Office and Greater Manchester Police "meant that we were able to get through the most awful of times", the family said.
The statement went on to add: "His interest was in the welfare of others.
"He will be remembered for this and we as a family are extremely proud of him and what he achieved and the people he helped."
David Cameron vowed to do "everything we can" to "hunt down" Mr Henning's killers.
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The PM also paid tribute to Mr Henning, the second Briton to be beheaded by IS, for his "kindness, peacefulness and gentleness".
Labour leader Ed Miliband said: "We will do everything we can to support the efforts of the Government to bring those guilty of this terrible act to justice."
A video lasting one minute and 11 seconds and titled Another Message To America And Its Allies, was posted on YouTube on Friday.
It shows Mr Henning, a taxi driver who was captured on an aid mission in Syria in December 2013, kneeling in front of a knife-wielding militant in a desert setting before being beheaded in front of the camera.
Video: British Jihadi's Message To Cameron
Mr Henning, who is dressed in red, says: "I am Alan Henning. Because of our Parliament's decision to attack the Islamic State, I, as a member of the British public, will now pay the price for that decision."
The masked killer, who speaks with a British accent and is believed to be the man responsible for previous beheadings, makes a direct statement to Mr Cameron: "The blood of David Haines was on your hands, Cameron. Alan Henning will also be slaughtered, but his blood is on the hands of the British Parliament."
Last week MPs voted to join the US-led coalition and take part in airstrikes against IS fighters in Iraq.
At the end of the video another hostage, a former US soldier turned charity worker believed to be Peter Edward Kassig, is paraded in front of the cameras. The militant in the video says Mr Kassig will be the next victim.
Video: Henning 'Handed Death Sentence'
The UK Muslim community condemned Mr Henning's murder, which came on the eve of the Islamic festival Eid Al-Adha.
A second video emerged on Friday which purports to show a British IS fighter - thought to be 27-year-old Omar Hussein, a former supermarket security guard from High Wycombe - calling on Western governments to send ground troops to fight IS militants.
Downing Street has said it is examining the video.
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Video: Imam Condemns Alan Henning's Murder