The Charity Commission has removed 28 late-filing charities from its register as part of its "double-defaulters" inquiry.
The commission opened a class inquiry in 2013 into a group of charities that had failed to file their annual documents for two or more of the previous five years.
Numerous charities have been added to and removed from the inquiry as they have either filed their late documents or been removed from the register. The commission has today provided an update on its work in this area.
It said that between April 2018 and March this year, 28 charities that were part of the inquiry submitted their outstanding documents and continued to operate as charities.
But it said that the same number of organisations were found to have ceased to exist or did not operate and were therefore removed from the register of charities.
The removed charities were generally smaller organisations, including the Swindon Racial Equality Council, the Lancashire Family Mediation Service, the South Yorkshire Fire Service Historical Society and the Citizen Advocacy Trust Gloucestershire.
The commission confirmed it had opened stand-alone inquiries into two double-defaulter charities, both of which have been announced by the regulator this year, because it identified "additional serious regulatory concerns".
These were the poverty relief charity the Future Vision Consortium and the education charity the Jalalabad Association.
In August the regulator published its report on the Future Vision Consortium and removed it from the register. Its conclusions in the case of the Jalalabad Association are due to be released soon, the commission said.
The commission added that the work on its double-defaulters inquiry had resulted in more than £51.6m of charitable funds being accounted for across 97 charities.
Amy Spiller, head of the investigations team at the Charity Commission, said: "Generous donors have a right to be able to see clearly how their money is being spent and be assured that it is going to the intended causes.
"This inquiry should serve as a reminder to all charities of the need to comply with their important legal duties or inform us if they are no longer operating."