Claims that taxpayers' money was used to pay for a hotel suite at the Conservative party conference that was allegedly used for a gay orgy will be looked into by the expenses watchdog.

Rooms costing up to £2,500 a night at Manchester's Light ApartHotel were booked by the Policy Research Unit, which provides parliamentary research for the Tory MPs, according to the Independent.

Most of the PRU's funding comes from public money as a result of payments from Tory MPs of around £4,000 each through their expenses.

Concerns were raised with senior Tory officials after gay app Grindr was used to "advertise" a sex party during the Conservative Party conference in 2011, according to the Independent.

The Independent Parliamentary Standards Authority played down suggestions it will launch an investigation but said it will look into whether public funds have been used for political purposes. Any activities involving consenting adults in the rooms will not form part of the inquiries of the watchdog as its remit concerns the use of public money.

A spokesman said: "MPs are not allowed to claims costs which go to party political activities. If there are suggestions that that may have happened, we would want to look into it."