A Mitcham grandmother wants the chance to thank a good Samaritan who paid for her Uber journey home after sitting in hospital for nine hours.

Nancy Glenwright, 83, was sat in the A&E waiting room at St George's Hospital on the morning of October 11, having been at the hospital since 10pm the previous night to visit her husband.

"She was shattered and exhausted," her grandson David Glenwright told the Wimbledon Times.

"The taxi she had booked to go home just wasn't showing up so she got talking to two people in the waiting room."

It was at this point that one of the ladies, who Nancy believed was in her early 30s, offered to order her an Uber.

"She then walked my nan to the car and made sure she got on her way safely," David added.

"She’d never used Uber before and wasn’t aware of how it works, so as far as she was aware the kind person had just offered to call a taxi for her.

"But it wasn’t until she got home that the driver told her it was already paid for which is when she realised that they already paid.

"My nan had no idea at the time just how generous this stranger was."

Now the family are looking to track down the kind woman so that Nancy can thank them properly.

"It's a stressful time with my grandad being in hospital and it's nice to know there are good people out there," David said.

"I know it's a longshot, but if anyone who works at that hospital or lives in the area can help that would be greatly appreciated.

"Let's see if we can track this person down so we can all say a great big thank you to them."

Are you the mystery person? Get in touch with David through his Facebook page.