The Ministry of Defence named the soldier as Lance Corporal Scott Hetherington, of 2nd Battalion The Duke of Lancaster’s Regiment.
He was killed at a military base in Taji, north of Baghdad, on Monday – becoming the first member o the British armed forces to die in Iraq since 2009.
L/Cpl Hetherington, know as Snowball by his friends, was taking part in Britain’s campaign against islamic State (ISIS) in Iraq and Levant.
He was a vehicle commander in a platoon, providing security for other troops.
Scott Hetherington had just become a father three months earlier
He said: “Utterly professional and talented, he was full of character, fun and his enthusiasm was infectious.
“The battalion has lost a huge talent and a real character. He will be missed dearly and we will never forget him.
“Our hearts go out to his parents, his siblings, his girlfriend and his young daughter. They are in all of our thoughts.”
Nigel Hetherington posted on Facebook: “I’ll always love you kid. So proud of you it’s unreal. I’ll never forget you or your stories.
“You truly are one in a million. Sleep tight little bro. Look after nan for us until we meet again. Love you Scott, more than I ever let on.”
Coalition forces continue to target ISIS in Iraq and Syria
Amber Roberts posted: “What an impact you made on so many lives. I don’t think I’ve ever met anybody with a happier soul.
“You will be missed so much. Rest well. You will forever be in our hearts.”
Liam Jackson said: “Scott Hetherington, you’re a little star. I’m absolutely gutted I’ve had my heart torn out.
“You never think anything like this will happen to any of your family. You did your country and your regiment proud.”
Taji is a rural district north of Baghdad
It is thought his death was a tragic accident, with US forces insisting it was a ‘non-combat related incident’.
Taji is a rural district north of Baghdad, where British military officers were sent to help train Iraqi forces in 2014.
In December, 150 soldiers from the deceased soldier’s battalion were being deployed to Iraq for six months.
The British solider was part of a US-led coalition fighting Islamic State
The Private from the Princess of Wales’s Royal Regiment took his own life at a base in Basra in February 2009 after suffering from depression.