Dame Priti Patel, a senior Conservative MP and former home secretary, accused Ms Rayner of a “new level of double standards” in light of her regular previous calls for several scandal-hit Tory politicians to resign.
Ms Rayner has denied any wrongdoing, referring to the row as a “manufactured” attempt to “smear” her and insisting “there was no capital gains tax to pay” on her property.
At a press gallery lunch in Westminster last month, she said confusion around her supposed “two homes” had resulted from her family “trying to look out for each other” at a difficult time while she spent eight months in intensive care with her baby son.
And in an interview with BBC Radio 4’s Today programme, Ms Rayner said she had received tax and legal advice which made her “confident that I’ve done absolutely nothing wrong”.
She went on to say she would only yield to demands from her political opponents to publish the advice if the likes of Rishi Sunak and Jeremy Hunt, the Chancellor, were to follow suit.
“I don’t think we are going down the road of MPs, whenever somebody says, ‘Well, what is happening with your capital gains tax’, we want to see all the information and detail…
“If we are, I’m happy. If we are all going to have a level playing field… You show me yours and I’ll show you mine.”