Lloyds Banking Group is poised to appoint as its new chairman Lord Blackwell, a former adviser to Margaret Thatcher and John Major.

Known as Lord Norman Blackwell the peer sat on Standard Life's board for nine years, the last four as senior independent director, until May last year, and was then appointed by Lloyds as a non-executive and chairman of Scottish Widows.

Lord Blackwell, 61, will succeed Sir Win Bischoff, who replaced Sir Victor Blank in 2009 a year after the enlarged group was created by the £21 billion bailout of HBOS. Former Citigroup chairman Sir Win, 72, said last May he would retire within a year after leading the bank through a critical period. He recruited Antonio Horta-Osorio to replace Eric Daniels as chief executive, the bank has been restructured into one focused on the UK economy, and its performance ensured the government was able to sell down a 6% stake in Lloyds in September to reduce its stake to 33%.

Sir Win is now likely to step down at next year's annual meeting. Reports said Lord Blackwell's appointment has still to be approved by the Financial Conduct Authority, the Prudential Regulation Authority, HM Treasury and UK Financial Investments. Lord Blackwell started his career with electronics giant Plessey,

He worked in Baroness Thatcher's policy unit for two years and returned in 1995 to head the unit for John Major, who made him a peer after the 1997 election.

He worked for NatWest for three years as director of group development until its acquisition by RBS in 2000, before starting a non-executive career. He is chairman of support services company Interserve, and a non-executive director of Ofcom and of health and safety group Halma.

Lord Blackwell gave evidence in Edinburgh Sheriff Court this year in the trial on breach of the peace charges of Noor Mohammed, a cleaner in a bank in Edinburgh and an employee of Interserve. The peer said a package sent to him containing a photo of an Islamic warrior had put him in a state of fear and alarm, but the jury returned a 'not proven' verdict.