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Tory Nadine Dorries is paying her daughter up to £39,999 a year to work as her office manager.

Philippa Dorries is doing the job while studying at the BPP Law School in London.

The cosy arrangement has revived the row over MPs employing relatives.

The practice was supposed to be banned as part of plans to clean up Westminster after the expenses scandal, triggered by shamed MP Derek Conway who put his family on the public payroll.

But the ban was scrapped after a backlash by MPs.

The Independent Parliamentary Standards Authority (IPSA), which oversees MPs’ pay and allowances, lists Philippa as earning between £35,000 and £39,999.

That is the full-time rate and officials will not reveal how many hours she is working or exactly how much taxpayers’ cash she is pocketing.

MP for Mid-Bedfordshire Ms Dorries, known as “Mad Nad” by fellow Tories, refused to comment, saying: “Go away. I don’t talk to the Mirror as you well know.”

MPs from outside London can claim up to £137,200 a year of taxpayers’ cash for staffing costs.

Robert Oxley, of the TaxPayers’ Alliance, called on the MP to come clean about what she pays her daughter.

He said: “The expenses scandal rocked the public’s trust in politicians, so it’s right that all MPs should have to account for how they spend taxpayer-funded allowances.

“This is especially important when that cash is being paid to family members working for them.”

The IPSA spokesman said there was no comparison between the Conway case and Philippa Dorries. “There is no suggestion that she is not doing the job,” he said.

Mr Conway, who was a Tory MP at the time, employed his son Freddie as a political researcher while he was a full-time student at Newcastle University.

A sleaze probe found “no record” of what work Freddie had done in return for his £1,000-plus a month salary.

His dad was ordered to repay £13,000, suspended from Parliament for 10 days and the Tory leader David Cameron kicked him out of the party.

The number of MPs’ employing relatives has actually increased since the expenses scandal.

There were 124 with loved-ones on the public payroll last November, up from 106 in 2008.