Kate Osborne says she followed Parliament's advice for taking taxis due to her disability.
The parliamentary watchdog will examine Geoffrey Robinson's spending on staff and accommodation.
Parliament's expenses watchdog wants around twenty people to take part in a review on MP salaries.
The MP is being investigated over his spending on "office costs, travel and accommodation".
Parliament's expenses watchdog says the rise is in line with pay rises in the broader public sector.
Parliamentary standards body says the last election saw an "almost-unprecedented" staff turnover.
Parliament's independent pay body has decided the salary should rise in line with senior civil servants.
MP Paul Maynard is alleged to have broken rules by using taxpayers' money to pay for campaign work.
Paul Maynard is accused of using taxpayer money to fund Conservative Party work and campaigning.