A former colleague of slain police officer Matt Ratana has raised over £40,000 for his bereaved family.

Lewisham Custody Sergeant Paul Hollis organised a 10km running event which participants could do in their own time between November20 December 10 to raise money for a support fund for Matt’s family.

Sergeant Hollis himself has ran 10k every day and completed his final 21st consecutive run today (Thursday, December 10).

Within weeks of launching the project, Hollis had hundreds of responses of people hoping to take part and contribute to the fundraiser.

"I organised the 10k running series in honour of my colleague and friend Matt in order to raise money for his partner," Hollis said.

"I initially only expected around 100 people to sign up but I’ve been overwhelmed with the support from everyone.

"Luckily colleagues have got involved helping with the massive logistical operation of posting the T-shirts and medals.

"I know that the event has gone global with people running in Matt’s honour in various parts of the world, even as far away as Pakistan," he added, underlining the success of the project.

As the Croydon Guardian reported previously, Matt Ratana was fatally shot and killed while detaining a suspect at Croydon Custody Centre at around 2.15am on the morning of Friday, September 25.

Tributes from across the UK and around the world, including from Matt's native New Zealand, poured in after his death.

A 23-year-old man, widely reported as Louis De Zoysa, was detained and arrested after he reportedly shot himself following Matt's fatal shooting and taken to hospital.