A Sky News investigation has found Northern Research Group (NRG) MPs received political donations from a private donor to help them with campaigning - weeks after they authorised thousands of pounds of taxpayer funded expenses to be spent on the NRG. It raises questions about whether MPs authorised public funding to be spent on the NRG because they knew they would be rewarded with a campaign donation. As a result of the investigation, the parliamentary expenses watchdog IPSA has announced an investigation. On the Sky News Daily, host Kimberley Leonard is joined by our deputy politics editor Sam Coates to uncover his investigation and findings, and what issues it raises for parliamentary funding. Producer: Soila ApparicioPromotions producer: David ChipakupakuEditor: Paul Stanworth