Six other men all admitted conspiracy to cause explosions with intent to endanger life. They are:
Abdul Aziz Jalil, who received 26-years' imprisonment;
Nadeem Tarmohamed, who received 20-years' imprisonment;
Junade Feroze, who received 22-years' imprisonment;
Mohammed Naveed Bhatti, who received 20-years' imprisonment;
Zia Ul Haq, who received 18 years' imprisonment; and
Omar Abdur Rehman, who 15 years' imprisonment.
Deputy Assistant Commissioner Peter Clarke, Head of the MPS Counter Terrorism Command and National Co-ordinator of Terrorism Investigations, said:
" Dhiren Barot and his gang were determined terrorists who planned bombings on both sides of the Atlantic.
"We know Barot was the ringleader of this terrorist cell. However, he needed the help of the seven men who have been jailed today.
"Six of these men pleaded guilty to being willing participants in a plot which could have led to the deaths of many innocent people. Faced with the overwhelming evidence against them, they were left with little choice but to plead guilty.
"The seventh man, Qaisir Shaffi denied the charges, but the jury saw through his lies.
"The plans for a series of co-ordinated attacks in the United Kingdom included packing three limousines with gas cylinders and explosives before setting them off in underground car parks. This could have caused huge loss of life. The plans to set off a dirty bomb in this country would have caused fear, panic and widespread disruption.
"The seven men jailed today were not the instigators of the planned attacks. But they were the planning team and were needed by Barot to contribute expertise in areas that he was lacking.
"They were the trusted few who researched, carried out reconnaissance and supported Barot. Each had a different role to play.
"Barot needed minders and drivers - people who could look after him as he carried out reconnaissance and conducted his meetings. He needed people to carry out research, gain access to specialist libraries, supply vehicles, false identities and travel documents, bank accounts, money and safe houses.
"These terrorists were skilled in anti-surveillance techniques, the use of coded messages and arranging secret meetings. Indeed, on one occasion Feroze and Jalil travelled literally hundreds of miles to use an internet café before returning to London to continue with their planning.
"The bulk of the evidence which shows the parts played by these men emerged not from surveillance but from enquiries carried out after they were arrested. There was painstaking examination of the mass of material found during searches. A huge amount of this material was on computers, some of it encrypted or deleted.
"The evidence in this case was obtained through close co-operation with the Security Service and our international partners. All parties involved in Operation Rhyme can be proud of the part they played in stopping this group before they could attack."