London bombing suspect Hussain Osman wanted to scare people but had no intention to kill, his lawyer has said.
Hussain Osman is being linked to the Shepherd's Bush attack
"It was a political protest to make people scared without hurting anyone," Antonietta Sonnessa told BBC News.
The 21 July failed bomb suspect was arrested in Rome and has been charged under Italian anti-terrorism laws.
Meanwhile, two Tube lines in the capital are to due become fully operational for the first time since the 7 July bombings.
District line trains will once again run between Wimbledon and Edgware Road, and the Hammersmith and City line will recommence between Hammersmith and Barking.
On Monday, another two men were arrested in connection with the 21 July failed London bomb attacks after three raids on separate addresses in south London.
Police in the UK say Mr Osman, 27, ran from Shepherd's Bush station in west London on 21 July - after he had allegedly attempted to bomb a train.
He is believed to have left London Waterloo on a Eurostar train on 26 July, travelling to Paris and Milan before arriving in Rome.
Ms Sonnessa said Mr Osman had been charged under Italian anti-terrorism laws with association with the aim of international terrorism and with possessing false documents.
The move allows the authorities to continue holding Mr Osman - also known as Hamdi Issac - and is separate from Britain's attempt to extradite him.
Ms Sonnessa said he would resist attempts to extradite him to Britain.
He was scared of returning "after what happened to the Brazilian" she said, referring to Jean Charles de Menezes, 27, shot dead by police who mistook him for a suicide bomber 11 days ago.
Mr Osman knew he had been carrying explosives, Ms Sonnessa added
"He also knew there wasn't a sufficient amount to cause damage."
SUSPECTED BOMBERS ARRESTED
1: Yasin Hassan Omar, 24, wanted over bomb attempt on a Tube near Warren Street, arrested in Birmingham
2: Muktar Said Ibrahim, 27, suspected of attempting to bomb a No 26 bus in Shoreditch, arrested in North Kensington, London
3: Ramzi Mohammed, wanted over failed attempt to bomb a Tube near Oval, arrested in North Kensington, London
4. Hussain Osman, 27 (also known as Hamdi Issac) wanted over the Shepherd's Bush attack, arrested in Rome
He had been "absolutely convinced and sure" no one would be killed, she told BBC One's Newsnight programme.
"The justification for it was to do with Muslim women and the way that they've been treated.
"He is just a poor lost boy on the wrong tracks."
Two of Mr Osman's brothers have also been arrested and questioned by police in Italy.
As the British police investigation into the failed bombings continues, officers with search warrants, supported by armed police, arrested two men after raiding one address in Clapham and two in Stockwell on Monday.
They are being questioned at a central London station on suspicion of committing, preparing or instigating acts of terrorism.
Police have also been allowed extra time to question Yasin Hassan Omar, the man suspected to trying to blow up a train between Oxford Circus and Warren Street.
He can be questioned until Wednesday. He was arrested in Birmingham on 27 July.
Two other suspected bombers, Muktar Said Ibrahim, 27, and Ramzi Mohammed, remain in custody after being arrested during an armed raid in London on Friday.
Suspects can be held for a maximum of 14 days under the anti-terror laws before they must be charged or released.