Karlina Raiba (5) left, and her sister Katrina (8) were paralysed in the horror crash

A British man faces jail after smashing his Land Rover into a family during road rage chase, leaving two sisters paralysed.

Andrew Nay, 39, crashed as he turned across oncoming traffic, causing Katrina Raiba, five, and her sister Karlina, eight, to suffer life-changing injuries last October.

Northampton Crown Court heard Nay, a Jaguar Land Rover manager and off-road driving instructor, was tailgating and "bullying" a woman driving a Mazda people carrier before the motorway smash in Northamptonshire.

ROBERTS RAIBAIS AND RENATE RAIBA Andrew Nay was chasing another driver following a road rage incident when the crash happened.

Harrowing in-car footage showed Nay's white Land Rover turning in front of the family's car.

Horrific dashcam footage shows a road rage driver crashing into a family's car - leaving two young sisters paralysedhttps://t.co/PoYzrQTy2X — ITV News (@itvnews) May 26, 2016

The girls' parents, Roberts Raibais and Renate Raiba described the impact on their daughters in a statement read in court:

ROBERTS RAIBAIS AND RENATE RAIBA In-car footage showed Andrew Nay's Land Rover turning in front of the family's car.

"Andrew Nay's reckless actions had devastating consequences for our two beautiful daughters.

Katrina and Karlina were happy, active children and he has robbed them of that.

We will never be able to forgive him.

Every day they ask 'when will we start feeling our legs again?' They think it's going to get better and it's too hard to tell them."

A witness to the crash, Leslie Miller, said of Nay's turn: "It was absolutely ridiculous. There was no reason why it couldn't have waited."

Representing the family, Richard Langton, a serious injury specialist from law firm Slater and Gordon, added: "This is one of the most heartbreaking cases I have ever had to deal with."

The judge warned Nay that he faced a prison term when he is sentenced.

- Agencies