The letter said Mr Flanagan appeared to treat Ms Ali in an “inappropriate manner. MSPs said the SPA’s “problems” lay with transparency and accountability and they criticised decisions to hold private “members’ meetings” to discuss governance without producing any public notes.Ms Ali told the committee last month that when she objected to proposals to hold meetings in private, Mr Flanagan wrote to her on Christmas Eve to express dissatisfaction with her views, and to suggest it would not be fair for her to continue to attend meetings.She said she had been told that expressing disagreement about the meetings in public was a resignation matter, and her “removal” from the board was “punishment for speaking out”.Mr Flanagan said in his statement on Wednesday: “I take pride in being a part of this chapter of policing history in Scotland and for the personal successes I have had since taking up the role in 2015 – in particular shaping a long-term strategy for Police Scotland, recruiting a new Chief Constable and senior leadership team, and setting a clear direction for bringing financial sustainability.”As a result, I am confident that the single police service in Scotland now has a solid platform from which to build an even better service for the people of Scotland. I hope that is a position on which we can build both consensus and momentum.” Andrew Flanagan at the justice sub-committeeCredit:Corbis News Mr Matheson said he was grateful to Mr Flanagan for his contribution as he announced a review of the support provided to the SPA board. Michael Matheson with Nicola Sturgeon at HolyroodCredit:Corbis News MSPs have been conducting an inquiry, alongside a probe by Derek Penman, HM Chief Inspector of Constabulary, into governance at the authority. He added: “Together with the Chief Constable, Andrew has led the development of the future strategy for policing, including extensive public consultation through the draft 2026 strategy.“However, he has acknowledged that mistakes have been made. He has offered a full and very public apology and made clear changes to transparency and governance in light of the concerns raised.“I have agreed that he will stand down from his role once a successor is identified and recruited through the public appointments process.” The under-fire chairman of Scotland’s police watchdog has announced he is to stand down amid ongoing controversy over his conduct and the governance of the organisation.Andrew Flanagan is resigning from the Scottish Police Authority (SPA), which oversees Police Scotland, after facing criticism from a former colleague and MSPs on two Holyrood committees.He said he would leave the role once a replacement was found to avoid being a distraction to the new 10-year policing strategy, adding: “Recent events have focused on my disagreement with a board member and perceptions of a wider lack of transparency in the SPA.”I have apologised to the former board member and put in place changes to the governance processes of the SPA.”There are many serious challenges faced by policing in Scotland but the continued media and parliamentary debate on these issues risks coming a prolonged distraction.”Mr Flanagan, chairman of the oversight body since September 2015, said he had concluded it was in the “best interests of policing” that he stand down.Last month, Jackie Baillie, convener of the public audit committee, wrote to Michael Matheson, the justice minister, the day after Moi Ali, a former board member of the SPA, accused Mr Flanagan of bullying her. Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.