Warwickshire County Council's new 18 year old leader
George Finch will serve as an interim leader until a permanent replacement is chosen.
A Reform UK councillor has resigned from his role as leader of Warwickshire County Council just five weeks after he was elected, leaving his 18-year-old deputy to take on the top job.
Councillor Rob Howard said health problems are preventing him from carrying out the role, which he was selected for on May 16, "to the level and standard I would wish" as he stepped down after 41 days in office.
The county council confirmed the current deputy chairman, 18-year-old George Finch will now serve as an interim leader until a permanent replacement is chosen.
Both Mr Howard and Mr Finch were elected as Reform UK councillors at the local elections on May 1.
In a statement shared on the county council website on Wednesday, Mr Howard said: "This has been a very difficult decision to take.
"The role of leader is an extremely demanding role and regretfully my health challenges now prevent me from carrying out the role to the level and standard that I would wish.
"I am honoured and privileged to have held the role, even if only for a short time.
"I remain committed to my continued role working as a county councillor for the benefit of Warwickshire residents."
Warwickshire County Council, which has alternated between a Conservative majority and no overall control since it was established in 1974, is under Reform control since the election on May 1.
However, despite securing 23 seats ,the party fell short of the 29 needed for a majority.
Alternative leadership nominations were made for Liberal Democrat councillor Jerry Roodhouse and Green councillor Jonathan Chilvers.
Mr Howard won the support of 28 councillors in his selection as leader, while Liberal Democrat councillor Jerry Roodhouse won 15 votes and Green councillor Jonathan Chilvers 10, with one abstention.
In a statement released by Warwickshire Liberal Democrats, Mr Roodhouse said Mr Howard's resignation was "regrettable, coming so soon after taking it on".
He said: "The instability in the leadership of the Conservative-backed Reform UK group is not good news.