TWO teenagers who planned a Columbine-style school massacre in Britain were locked up yesterday for a total of 22 years.

Thomas Wyllie and Alex Bolland, both 15, drew up a hit list of pupils and teachers they intended to shoot dead.

13 Thomas Wyllie has been jailed for plotting a Columbine-style attack

13 Alex Bolland was just 14 when he planned the attack with Wyllie

Wyllie even imagined the aftermath, writing in his diary: “If this is found I have committed one of the worst atrocities in British history or I killed myself.”

He and Bolland — both loners at the school in Northallerton, North Yorks — claimed they were seeking revenge for bullying.

But twisted plot mastermind Wyllie hated authority figures and was obsessed with serial killers and blood-thirsty films.

Bolland boasted of their plan in a text to a pupil saying: “You know we’re gonna do this school shooting . . . don’t take it as a joke.”

13 The Columbine killers Dylan Klebold and Eric Harris killed 13 people in 1999

13 The contents of a rucksack that was found by officers searching Wyllie's hideout Credit: PA:Press Association

13 The trial earlier heard the pair 'hero-worshipped' Columbine shooters Eric Harris and Dylan Klebold Credit: Getty - Contributor

13 One of the boys suggests they 'shoot up the school' to the other Credit: PA:Press Association

13 A page from the diary of one of the boys today convicted on conspiracy to murder Credit: PA:Press Association

The pair downloaded a bomb-making manual to make a device like the one that killed 22 people at the Ariana Grande concert in Manchester in May last year.

They intended to torture and murder the parents of Wyllie’s girlfriend and steal her dad’s shotguns.

After lying low at a hideout where they had stashed screws and flammable liquid to make a nail bomb, they would attack the school.

The pair were obsessed with Eric Harris, 18, and Dylan Klebold, 17, who killed 12 students and a teacher in the Columbine High School, Colorado, in April 1999.

13 A message exchange between one of the boys and a girl who he confessed their plan to Credit: PA:Press Association

13 A bottle which had flammable liquid in, also found in Wyllie's hideout Credit: PA:Press Association

13 Cops found materials they said were for building an explosive device Credit: PA:Press Association

13 A rucksack found by cops when they investigated claims two teens were planning a school attack Credit: PA:Press Association

13 A small bag full of screws was found as part of the boys' plot to attack the school Credit: PA:Press Association

13 Thomas Wyllie and Alex Bolland arriving at Leeds Crown Court Credit: London News Pictures

Columbine - the massacre that sent shockwaves across the world On April 20, 1999, 18-year-old students Eric Harris and Dylan Klebold murdered classmates in the school in Littleton, Colorado, in cold blood. Dressed in trench coats, the demented duo began opening fire on pupils outside the school before moving inside and spraying bullets at victims in the library. It later emerged Harris and Klebold placed two duffel bags each containing a 20-pound propane bomb set to explode in the cafeteria and waited outside. But when the bombs failed to go off, they started gunning down students - firing a total of 188 rounds of ammunition during the bloodbath. The pair murdered 12 students and one teacher and injured 21 others before they killed themselves after a shootout with police. But the massacre was tragically not a one off and children in America continue to be exposed to gun violence that is unparalleled anywhere in the Western world. More than 187,000 kids have been exposed to gun violence at school since Columbine.

Trailer for Bowling for Columbine - Michael Moore's hard-hitting documentary about guns in America

MOST READ IN NEWS HAPPY MEAL McDonald’s worker pays customer’s bill after he calls mum to ask for her order Exclusive PIERS PRESSURE Couple wiped out village's internet for 18 MONTHS to watch Piers on £30 TV STORE TOT SNATCH Family's horror as 'kidnap gang try to rip girl, 1, from pram' in TK Maxx NEVER FORGET PM & celebs backs The Sun's campaign to save the Poppy Appeal from coronavirus Exclusive HAPPY MEAL McDonald’s worker who paid for lad’s meal has secretly bought food for MONTHS Warning HORROR SMASH Great-grandad, 59, thrown 100ft in air as he is killed by hit-and-run driver

Wyllie and Bolland were found guilty of conspiracy to murder at Leeds crown court in May.

Neither showed any emotion yesterday as judge Mrs Justice Cheema-Grubb said: “You were only 14 when you planned to murder teachers and pupils.”

She locked up Wyllie for 12 years and Bolland for ten.

We pay for your stories! Do you have a story for The Sun Online news team? Email us at tips@the-sun.co.uk or call 0207 782 4368. You can WhatsApp us on 07810 791 502. We pay for videos too. Click here to upload yours.