On Thursday, trauma surgeon David Nott was in London - a long way from Ukraine. But that didn't stop him from helping to save the leg of a man who'd been caught by a blast in the war-ravaged country.
Oleksandr, the doctor who actually carried out the operation, had never performed the tricky procedure before. But a little over a week previously he had watched Prof Nott demonstrate how it was done inside a Ukrainian hospital.
And so Oleksandr took a photo of the wound with his smartphone and sent it to Prof Nott, who had recently flown back to the UK. The experienced British war surgeon confirmed the operation was necessary. He'd also previously given Oleksandr a video talking him through how it was done..
"I was quite nervous and it was slowly, step-by-step surgery, but it went well thanks to David Nott," Oleksandr says.
Prof Nott, who was born in Carmarthen in west Wales, has previously worked in conflict zones including Afghanistan, Iraq and Syria.
