An assassin known as The Iceman has finally spilled the beans on two executions that landed him in jail until his dying day.

Mark Fellows showered a hail of bullets on gangland rivals but never explained how or why.

Now the Sunday Mirror can reveal he has finally admitted his guilt over the Salford drug wars that earned Manchester the title “Gunchester”.

In letters from jail, sickening Fellows tells how he:

Paul Massey was labelled Salford's "Mr Big"

The hits were the bloody culmination of a tit-for-tat drug war between Massey’s “A Team” and the “Anti-A Team”.

He reveals how, night after night, he lay hidden in a churchyard with an Uzi submachine gun waiting for the perfect moment to kill Massey, 55.

And he even laughs as he tells how he considered killing a cop.

Fellows writes: “The night before I was waiting for Massey and a police officer turned up when I was laying there.

“I thought that I was going to have to do him but he never saw me. Ha ha ha!”

Friends and family laying flowers after the Massey shooting

It was 7.27pm on July 26, 2015, when Fellows pulled the Uzi from a bag and fired round after round at Massey.

Fellows says that despite the false beard, mask and being clad in combat fatigues, Massey still spotted him as he stepped from his Series 5 BMW.

A murder trial at Liverpool Crown Court was told 18 rounds were fired – four hitting Massey’s chest.

Fellows pleaded not guilty to two murders but was convicted.

Now he explains in grisly detail just what happened.

Of Massey, a grandfather, he writes: “I parked my van in the estate, my bike was in the back. I had my mountain bike gear on.

"I rode to near Paul Massey’s house and put my bike in the bushes.

"I got to the church, changed into the army gear and put a false beard on. I was laying in the churchyard, Massey’s house in front of me.

Fellows made the revelations in letters from jail

“[Massey] saw me, so I shot at him from across the road, but missed. When I crossed over, he was behind the bins, hiding. I was playing games with him, shooting at his feet like they do in cowboy films.

“That’s why he got shot in his foot and that’s why so many bullets were fired. He tried to make it to his front door, so I put one in his chest. He hit the floor, out cold. I didn’t want to get close, so stood back and shot four times at his head.

“I missed and my clip had run out, so I made my way home. If I’d have got close... I’d have hit his head and he wouldn’t have been able to make any phone calls, but at least he is dead.”

The murder trial heard a 999 call made by Massey.

He said: “Ambulance. I’ve been shot... hurry up”.

The operator asked the postcode – then the line went silent.

Massey made his name selling drugs in Man-chester’s 1990s rave scene and was a known “face” in Salford.

An Uzi submachine gun was used in one killing

Meanwhile, Kinsella, 53, was respected and feared in equal measure and famously intervened when a gangster threatened “to maim” former Liverpool and England footballer Steven Gerrard, 40.

Fellows was said to be a trusted foot soldier in the so-called Anti-A team.

The gang feud – which as recently as last year spilled over to the Costa del Sol – is thought to have begun when a woman threw a drink over a member of the A Team in summer 2014.

Violence quickly escalated. A shotgun was fired into a car, injuring one man, before another victim suffered horrific injuries in a machete attack.

In March 2015 a grenade was thrown at an A Team family member’s house. Months later Christian Hickey, seven, and his mother Jayne were shot and injured at their home.

The picture of Christian in a hospital bed shocked the nation.

He was left in a wheelchair and needed a string of operations to be able to walk again.

Police and a forensic team outside Massey's home

His dad, Christian Hickey Snr, had been the intended target.

Fellows – nicknamed Iceman for being cold and calculated – was already in the frame for Massey’s murder when he shot Kinsella in May 2018.

The victim was walking in woods in Rainhill, Merseyside, with his partner. In one of his letters, Fellows says: “Kinsella was lying on floor so I put another one in him to shut him up... then I put two in his head.”

Kinsella – who had a six-week-old baby – was considered a small-time player but the killings were strikingly alike.

Detectives found a Garmin watch Fellows used for long-distance running. It recorded him on a reconnaissance run shortly before Massey’s killing.

The data correlated with the hundreds of hours of CCTV and phone records analysed by police.

Fellows was found guilty in February 2019 of murdering Massey and Kinsella.

He is one of only 70 UK people to get whole life terms.

Co-defendant Steven Boyle, 36, was found guilty of the murder of Kinsella, but cleared over Massey’s killing.

He was jailed for life and will serve a minimum of 33 years.

Last month Fellows was handed another life sentence for his part in a machete attack on Aaron Williams, an associate of the A Team gang.

Police found £10,000 in Fellows’ house, thought to be his assassin’s fee .

An armed police convoy arriving at Liverpool Crown Court with Fellows and Steven Boyle

But in his confession from jail Fellows says he shot Massey after the mobster threatened to kill him over the drugs turf war.

Fellows says he killed Kinsella after hearing the Merseyside gangster had offered £20,000 to anybody prepared to “cut” him.

Fellows writes: “Massey didn’t want me selling drugs in that area and that’s when all this started to happen.

“I knew the threat wasn’t going to go away, I knew Massey would keep sending people to my home until he achieved his aim. He left me no choice. I had to protect my wife and children.

“I decided ­therefore, to shoot him before he shot me or a member of my family.”

Chillingly, Fellows also said his sentence gives him the freedom to kill again if he feels threatened behind bars. And he told how he hoped he would die of cancer so he would not have to serve his whole jail sentence

Fellows adds: “If I need to, I can kill again if people try things. I am not a**ed about my appeal. If someone tries anything in here and I see them coming, then I can do what I want and can’t get no extra time.

“I will be 40 years old soon, only another 60 to go until I am released. Ha ha ha! Knowing me I will live until I am 100 or more.

“I hope I have only got a couple of years to do. I hope I get cancer soon, so I don’t have to see these walls for a long time.”