Ten moped robbers who armed themselves with hammers, knives and guns in £1.2 million worth of phone shop raids across London have been jailed for a total of 110 years.

Over seven months, the men broke their way into stores using portable angle grinders and fencing blocks used as makeshift battering rams, which were left as a calling card.

Wearing motorcycle helmets and dark clothing, they ransacked the stockrooms of 17 shops, sweeping high-end iPhone and Samsung handsets into tonne bags.

The raids were over in minutes and they made their getaway on mopeds and scooters, in the mistaken belief that discarding their helmets would halt any police chase.

All but one of the raids, which happened between May 1 and November 27 last year, were carried out on shops run by mobile phone company Three.

They cost the firm costing the firm an estimated £1.2 million in lost stock, damage, increased security and the closing of a branch targeted four times.

Courtney White, 23, Mominur Rahman, 22, Mohammed Hussain, 24, Chang Mabiala, 22, Mohammed Ali, 24, Chris Costi, 19, Bobby Kennedy, 22, Alfie Kennedy, 21, Adam Attalah, 21, and Dylan Castano Lopez, 20, were all either convicted of, or pleaded guilty to, conspiracy to commit burglary.

Judge Michael Simon jailed the gang for a total of 110 years and one month at Blackfriars Crown Court, describing them as "young in chronological age, but old in criminality".

"The attacks were highly organised and meticulously planned," he said.

"Nothing and no one was allowed to stand in the way of this gang's intentions."

Three security guards were beaten and one witness was threatened with a firearm during the spree.

One attack, captured on CCTV, drew gasps from the jury when it was played in court, the judge said, adding: "There can be no doubt their experience at the hands of this gang was terrifying and traumatic."

The court heard Three attached GPS tracking devices to some phones in their stores, which were tracked when they were stolen by the gang.

The judge praised the work of detectives from the Metropolitan Police, who "meticulously" pieced the case together from many strands.

He added: "This case understandably generated not insignificant press interest.

"This is not surprising given the number of features - gangs, mopeds, knife crime, to name but a few – that are so uppermost in the minds of those who live in London and elsewhere, who are consistently bombarded with more news of crimes committed with some or all of those features."

White, from Wood Green, was jailed for 18 years, with a two-year extended licence period; Rahman, from Camden, was jailed for 12 and a half years; Hussain, 24, from Hackney, was jailed for 10 years; Mabiala, from Islington, was jailed for eight and a half years; Ali, from Hackney, was jailed for seven years and one month; Costi, from Hackney, was jailed for eight and a half years; Bobby Kennedy, from Islington, was jailed for 11 and a half years; Alfie Kennedy, from Shoreditch, was jailed for 13 years and one month; Attalah, of no fixed address, was jailed for 10 years and 10 months; and Lopez, from Camberwell, was jailed for 10 years and one month.

Additional reporting by Press Association