A paralysed pregnant woman wearing a bionic suit has completed the Great North Run in England five days after she started it.

Claire Lomas, who is 16 weeks pregnant, was left paralysed from the chest down following a horse-riding accident in 2007.

She began the half-marathon on Wednesday, running more than 21 kilometres from Newcastle to South Shields.

Ms Lomas crossed the finish line at about 10:00am on Sunday (local time), according to the BBC.

She said morning sickness had hampered her training for the event but finished the race anyway.

"I was very tired and I just haven't felt quite like myself. It's not the lead up I normally would have had," she told the BBC after finishing the half-marathon.

The Great North Run is Britain's largest running event with more than 50,000 participants.

Ms Lomas described the last leg of her race as "surreal".

"I just kept looking at my feet and I have to really concentrate to walk anyway," she said.

"So I was just thinking about what I was doing. I did catch a foot a couple of times when the ground got slightly uneven."

Claire Lomas finishes the London Marathon in May 2012, 16 days after the event began. ( AFP: Carl Court )

The suit she wore mimics the response that the wearer's joints would make if they were not paralysed.

In May 2012, she became the first person to complete a marathon in a bionic suit after she completed a 42.2 kilometre course, 16 days after the race began.

The British paralympic athlete also lit the Paralympic Cauldron in London's Trafalgar Square ahead of the London Games in 2012.