The dad of a beloved Itchen College teacher and coach has called for government action to battle brain tumours after the "heartbreaking" death of his son in March.

Hundreds of students turned out to say their final goodbyes to Glenn Colmer, Itchen College's director of curriculum for sport and protective services, who died at the age of 51.

He died just ten days after he was diagnosed with a high-grade glioma.

Tributes were paid to the "incredible" teacher and coach who inspired thousands of young people, including Olympic gymnast Kelly Simm, who said he "will be massively missed".

But now his dad, Tony Colmer, 72, is urging the government to take action, after losing Glenn changed his family "forever".

READ MORE: Tributes paid to 'incredible' Itchen College sports teacher

Tony said: "Brain tumours kill more children and adults under 40 than any other cancer, and more men under 75 than prostate cancer, yet just one per cent of the national cancer research spend goes to brain tumours.

Tony Colmer, left, at the Danceathon held in memory of his son Glenn.Tony Colmer, left, at the Danceathon held in memory of his son Glenn. (Image: Brain Tumour Research) "That’s simply not good enough.

"We are raising money not only to fund vital research but to demand more from the Government."

Glenn suffered a seizure at home on February 18, and he was taken to Southampton General Hospital, where scans revealed an aggressive tumour.

READ MORE: Staff and pupils turn out to say goodbye to Glenn Colmer

Ali Colmer, Glenn’s wife, said: "Glenn was fit, healthy, and full of life, none of us could have imagined that a seizure would be the first and only sign of something so devastating.

"We had just ten days from diagnosis to saying goodbye.

"There was no time, no chance for treatment, no hope. That’s why we’re speaking out."

The community Danceathon held in memory of Glenn Colmer.The community Danceathon held in memory of Glenn Colmer. (Image: Brain Tumour Research) In the weeks since his death, Tony has raised £1,000 through a community danceathon at West End Community Centre, where 70 people took part.

So far, the Hampshire community has raised nearly £5,000 for Brain Tumour Research.

A charity golf day in Glenn’s memory is planned for August 1 at Southampton Municipal Golf Course, one of his favourite courses.

Ali continued: "If more funding can give another family more time, or even a chance at survival, then Glenn’s legacy will mean something."