Angela Rayner faces renewed pressure after it emerged six of her former neighbours have been questioned by police in the 'two homes' probe.
One resident has even said they are prepared to give evidence in court contradicting the account of the Labour deputy leader.
Ms Rayner maintains that an ex-council house she sold for a £48,500 profit in 2015 was her 'principal property'.
But neighbours say she was actually living at her husband's house a mile away.
Police are now investigating potential breaches of electoral law, a failure to pay capital gains tax and whether a single-occupancy council tax discount was falsely claimed by Ms Rayner.
Angela Rayner (pictured) faces renewed pressure after it emerged six of her former neighbours have been questioned by police in the 'two homes' probe
She claims legal advice she received exonerates her from any wrongdoing, and has said that if the police find she has broken the law she will stand down as Sir Keir Starmer's number two.
Several of her former neighbours in Stockport, Greater Manchester, have now been spoken to by officers, The Mail on Sunday revealed yesterday.
Among them is Chris Hinett, who recalls Ms Rayner telling him she was the landlady of the ex-council house in Vicarage Road, which is at the centre of the probe, after he intervened when another neighbour's son kicked a football through a window of the house.
'She told me she was the landlady of the house and her brother lived there, and he wasn't strong enough to deal with the likes of us,' the 64-year-old said.
'I have given a statement to the police, and I said to them I am happy to say in court that she told me she was the landlady.
'If she says she lived at Vicarage Road, I am saying she is a liar.'
His intervention comes after Sylvia Hampson, 83, who still lives next-door to Ms Rayner's then husband Mark's former house in Lowndes Lane, said the Labour frontbencher is 'a f***ing liar' if she was saying she hadn't lived there with him.
Mrs Hampson has been interviewed twice by police who have also spoken to her son and another pensioner who has lived opposite her on Lowndes Lane for more than 20 years.
A Labour spokesman said: 'Angela has been clear that she will co-operate with any investigation.
'We remain confident that she has complied with the rules. 'It's now appropriate to let the police do their work.'
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