Flint worked at HSBC for almost 30 years, and was appointed chief executive at the bank in February 2018, stepping down in August 2019.

He was appointed in February to a panel set up to review the operation of ring-fencing legislation and any risks arising from proprietary trading activities.

It is led by chair Keith Skeoch who was appointed on 21 December 2020 and includes  Patrick Honohan, who was the governor of the Central Bank of Ireland.

Former Close Brothers chief executive Preben Prebensen, the economist Linda Yueh and regulator Betsy Nelson were also appointed to the panel.

Flint relinquished his position as a member of the independent review panel due to his commitments at the UK Infrastructure Bank.

This was set up in June and is aimed at tackling climate change and leveling up the UK.

The Financial Services (Banking Reform) Act (FSBRA) 2013 requires the new panel to submit its reports to the Treasury and any recommendations.

The panel will also examine four areas including the competition in the banking sector, competition in the UK mortgage market, the international competitiveness of the UK banking sector and the provision of finance and related financial services to the economy.

The review’s terms of reference were published on 24 September.