Deputy Prime Minister Angela Rayner has admitted she did not pay enough tax on her second home, and has referred to herself to the adviser on the ministerial code.
The senior Labour figure said underpaying stamp duty on the £800,000 seaside flat in Hove was an "error" that she "deeply regrets".
Rayner, who is also the Housing Secretary, said she has been "in shock" and "devastated" over the fallout and that she had spoken to her family about quitting.
She has been under increasing pressure to be transparent about her tax affairs, after it was reported she saved £40,000 in stamp duty on the Hove property by removing her name from the deeds of her home in Ashton-under-Lyne.
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