First Secretary of State

The First Secretary of State is an office sometimes held by a minister in the Government of the United Kingdom. The office indicates seniority, including over all other Secretaries of State. The office is not always in use, so there have sometimes been extended gaps between successive holders. It currently ranks second within the Cabinet, excluding the Prime Minister, below only the Deputy Prime Minister, however has historically indicated deputising ministers. The office is currently vacant since the promotion of Sir Edward Craig to Deputy Prime Minister. The corresponding shadow minister is the Shadow First Secretary of State.
Like the Deputy Prime Minister, the First Secretary enjoys no right of automatic succession to the office of Prime Minister. However in the Redd Ministry unlike the Deputy Prime Minister who's key role is to deputise for the Prime Minister during weekly Prime Minister's Questions and to chair the cabinet when the Prime Minister is absent the First Secretaries primary role is management allowing the Prime Minister and Deputy Prime Minister to focus on policy and governance. This is demonstrated by the current holder being very much the Fixer of the current governement having headed up by the Governements responce to the February 2020 Terror Attacks and managing Cabinet adjustments such as the removal of John Healey and George Bennett from cabinet following their individual downfalls, he is also credited with the selection of Jonathan Reynolds as Bennett's replacement. 
Its most recent itteration, the role carries no other responsibilities above Management and Coordination allowing its holder to carry the other roles of Chancellor of the Duchy of Lancaster and Secretary of State for National Security.