Jeremy Corbyn helped organised a meeting for the Squatters Action for Secure Homes (Squash) group
The Labour leader and his hard-Left ally John McDonnell helped organised a meeting for the Squatters Action for Secure Homes (Squash) group at the House of Commons.
Squash has published a DIY guide giving advice on how to disable burglar alarms, barricade entrances and frustrate eviction proceedings.
The pair also called for anti-squatting laws to be repealed to give activists rights to seize private property.
And Mr Corbyn also endorsed a "nomad law" campaign that would reinstate taxpayer-funded legal aid payments to people accused of trespassing offences.
A Tory minister last night warned that the Labour leader's links to squatters was further evidence of the chaos that could follow if he managed to sneak into Downing Street after the general election.
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Corbyn would go back to the bad old days of Labour, where planning rules weren’t applied fairly
Home Office minister Brandon Lewis
Home Office minister Brandon Lewis said: “Jeremy Corbyn wants to give taxpayers’ money to trespassers and give a green light to illegal encampments across England.
"These extreme and nonsensical policies would blight communities, causing misery for their law-abiding citizens.
"Corbyn would go back to the bad old days of Labour, where planning rules weren’t applied fairly and special treatment was given to different groups.
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Mr Corbyn and John McDonnell also called for anti-squatting laws to be repealed
“Worse, Jeremy Corbyn would rip up anti-squatting laws, endorsing militant groups and anarchists who want to break into people’s property when they are away.
“Theresa May’s Conservatives will protect people’s homes and stand up for the rule of law.
"Only a vote for Theresa May and the Conservatives will avoid putting Corbyn in Downing Street at the head of a coalition of chaos, with the Lib Dems and SNP pulling the strings.”
The Tory dossier collated evidence of the support offered by Mr Corbyn and his shadow chancellor to groups supporting so-called "squatters' rights".
They hosted a Commons meeting for Squash in 2013, the dossier showed.
The Labour leader has described squatting as ‘one of Britain's oldest forms of tenancies’
Mr Corbyn described squatting as "one of Britain's oldest forms of tenancies" and called for "resistance" to measures to defy squatting.
The Tories also highlight plans buried deep in Labour's genereal election manifesto promising wider "travellers' rights" and backing the "nomadic way of life".
And the dossier showed Mr Corbyn opposed the eviction of travellers from the unauthorised camp at Dale Farm in Essex in 2011 in a high-profile legal battle.
A Labour spokesman did not deny that the pair had supported squatters' and travellers' groups, adding: "This is not official Labour Party policy.
"This is just the Tories trying to distract attention from their damaging policies like the dementia tax."