A planned takeover of a struggling school in Northumberland has been cancelled amid fears over its future.
Haydon Bridge High School has been in special measures since 2014, and was earmarked by the government to become an academy.
It will now stay under local council control, after Bright Tribe Trust walked away, saying falling pupil numbers have "had an insurmountable impact on the school’s long-term viability."
Haydon Bridge was judged by inspectors as 'inadequate' three years ago, and the government named Bright Tribe as its preferred sponsor in October 2015.
That takeover was meant to be completed by September 2016.
In May 2017, Ofsted said: "Unacceptable delays and disputes over the leadership and status of the school over the past two and a half years have resulted in pupils being badly let down."
Bright Tribe has now said it will no longer support the school, as it presenters "a significant financial risk" to the trust.
Haydon Bridge has capacity for 900 pupils, but only 361 were on roll in October 2017.
A merger with another local school has been suggested previously.
Bright Tribe is a not-for-profit trust with 16 academies around the country.
It does now run Grindon Hall Christian School in Sunderland and Haltwhistle Community Campus in Northumberland.
It has faced controversy over its running of Whitehaven Academy in Cumbria, which it today announced it was withdrawing from.
The trust's Chief Operating Officer has also departed, having only been in post since February 2017.