A primary school teacher who lost all her limbs to sepsis has returned to the classroom.
Kath Tregenna, 47, fell critically ill after suffering a fever.
To save her life doctors had no choice but to perform a quadruple amputation.
Mum-of-two Kath lost both her legs below the knee and her two arms below the elbow.
She is now back teaching thanks to new bionic arms.
Kath said: "As I was going through my recovery, I really knew in my heart that I wanted to get back into the classroom and get back to teaching."
Kath says the 'Hero' arms made by Open Bionics are popular with her pupils.
She added: "It's all thanks to arms I am able to teach again.
"From writing on the school board to carrying books, children are obsessed with the Hero Arms and always ask me to show how they work.
"From the moment I arrive at school, I'm using the arms to do all sorts of tasks."
Kath, who lives and teaches in London, fell ill in the run-up to Christmas two years ago.
She left work early on Friday and called 111 when her condition worsened during the weekend.
Kath said: "I owe my life to the 111 operator who noticed some of the symptoms of sepsis and called an ambulance."
Kath has very little memory of the one months she spent in intensive care following life-saving surgery.
While recovering from the operations she was prescribed prosthetic arm hooks that were uncomfortable and heavy to wear.
However, her former school managed to fund raise enough money to cover the costs of a Hero Arm.
The prosthetic was so good that she managed to buy a second just months later.
The 3D-printed arms are customised to Kath's body and match her individual requirements.
They use 'myoelectic' sensors to detect nerve signals and convert them into prosthetic hand movements.
Open Bionics co-founder Samantha Payne MBE said: "Kath is incredible. Our entire team is in awe of Kath's determination to get back to doing what she loves most - teaching.
"Seeing her using both of her Hero Arms for everyday things really puts into perspective how important bionic technology can be when it comes to giving people recovering from life-changing surgeries a level of independence to achieve their goals."
