Families of two people killed in an M1 crash have paid tribute to a dad with "the biggest heart" and a teen who was "a calm within chaos".

Darren Reilly, 55, and Tyler Cox, 18, both died at the scene after the collision between junctions six and five, near Watford, at around 8.10pm on April 1.

In a tribute, Darren’s two daughters said: “Our dad was a brilliant dad. In fact, the best dad who loved us with all his heart.  

“He would do anything for anyone in his heart and made sure he went above and beyond for his own. He lived life to the absolute max. In his 55 years he did more than anyone else could manage in two lifetimes.

Watford Observer: Darren's two daughters said: “He will be missed by his friends, family and everyone that knew him.Darren's two daughters said: “He will be missed by his friends, family and everyone that knew him. (Image: Hertfordshire Police)

“Dad had the biggest personality, the biggest heart and when he was passionate about something, everyone knew. He was the most spontaneous man and such a loveable rogue. 

“He will be missed by his friends, family and everyone that knew him. He leaves a large void in our family, a void that will never be filled.”

The family of Tyler Cox have also paid tribute to the “much-loved daughter, sister, granddaughter, cousin and friend”.

They said: “At just 18 she possessed a rare openness that endeared her to all. She offered genuine love and compliments, regardless of familiarity. 

Watford Observer: The family of Tyler Cox said she was a much-loved daughter, sister, granddaughter, cousin and friend.The family of Tyler Cox said she was a much-loved daughter, sister, granddaughter, cousin and friend. (Image: Hertfordshire Police)

“Tyler was a calm within chaos. Despite her typical teenage interests in TikTok and K-pop, her maturity and wisdom was undeniably beyond her years.

“Her giggles at what was going on around her was sometimes the only reminder of how young she was."

They continued: “Tyler's humble nature and determination, combined with how perceptive she was, hinted at the heights she could reach in life. 

“What an amazing girl we had. Her energy, indescribable in words, is deeply missed by all who knew her. Though her absence is felt keenly, we must find solace in the belief that Tyler now rests in eternal peace, her spirit unencumbered by earthly concerns.

“Until we meet again. We love you.”

A 33-year-old woman remains in hospital with “serious injuries” while a 10-year-old girl and eight-year-old boy are recovering at home, Hertfordshire Police confirmed.

Anyone with information has been urged to report it via the Herts Police website or non-emergency number 101, quoting Op Dolan.