Lindsay MacCallum has worked in the third sector for decades but left her job with Rainbow Valley earlier this year.

Police Scotland are investigating the co-founder of a Scottish cancer charity over reported “financial irregularities” involving the group. 

Lindsay MacCallum, 59, will be reported to prosecutors over the Rainbow Valley cash claims — three months after quitting her role as a project manager there.

The Scottish Sun reports that the charity has confirmed they are cooperating with Police Scotland as they investigate, just days after Ms MacCallum was arrested. 

The former staffer had worked in the third sector for 30 years, but it is understood she was arrested on October 30. 

A Rainbow Valley spokesperson told the Sun: “The team at Rainbow Valley remains wholly committed to our purpose, our mission and our vision to empower those living with or affected by cancer.

“We have been fully supportive of Police Scotland with their investigation.

“The charity has brought so much joy into the lives of many people in the UK and will continue to do so into the future.”

Rainbow Valley supports families living with and overcoming cancer with the aim of improving their living conditions.

The organisation is the brainchild of Angela MacVicar, who lost her daughter Johanna to cancer in 2005.

A statement published on the charity’s Instagram page on August 4, shows a snap Ms MacVicar beside Ms MacCallum announcing her departure from the organisation.

It reads: “It is with a heavy heart I am letting everyone know that Lindsay MacCallum has decided the time has come to leave Rainbow Valley as an employee.

“Lindsay has been at my side from the very beginning and instrumental in developing the unique courses we provide to help those with a cancer diagnosis to take back control, and create Johanna’s vision to have a place that provides this.

“Together, with Shonagh MacVicar, we founded Rainbow Valley In July 2012 and I know you will all be sad to see her go but cheer her on on whatever path she chooses to take.

“She leaves with our love and gratitude for taking the charity to where it is but we are excited for her that she will have the time to work with her husband on the family business and pursue other adventures.

“Always a part of Rainbow Valley Family, don’t be a stranger Lindsay, we will miss you. Xx”

A Police Scotland spokesperson told the Sun: “A 59-year-old woman has been arrested and charged in relation to alleged financial irregularities involving a registered charity based in Milngavie.

“A report will be submitted to the Procurator Fiscal.”