Susan was not more than the surprise when the results were seen before their home DNA test kit.

Now in the mid -70s, a woman, she never knew more about her grandfather, and paid to pay for a personal test whether she had thrown anything unusually unusually.

“I saw that there was a lot of Irish heritage, as far as I knew that was wrong,” she says.

“But I pushed it aside and no one else thought about it. I stopped paying for my membership and that was.”

Except that it was not enough.

It took another six years for Susan – not her real name – to feel everything about her family history she knew that she was wrong.

He later discovered that in the 1950s, he was swapped at a busy NHS maternity ward at birth for another child.

His case is now another type of exposed by the BBC. Lawyers say they expect cheap genetic testing and bouncing in lineage websites.

A sharp, funny woman with a shoulder length white haired, Susan tells me her story from my front room somewhere in southern England.

Her husband is sitting next to her, jogging her memory and sticking from time to time.

After taking that DNA test almost a decade ago, the genealogy company recorded its data into its huge family tree, allowing other users to make contact with their genetic relatives – close or away.

Six years later he received a message from blue.

The stranger said that his data matches him in a way that can only mean one thing: he should be his genetic brother.

“It was just nervous. It was every feeling about which I could think, my mind was everywhere,” she says.

The first reaction of Susan was that it could be secretly adopted. A few years ago, both his parents died, so he aroused courage and asked his elder brother.

He was sure that the whole thing was a scam. Her sister was always a part of her life, and she was “absolutely certain” that her first memories were to become pregnant of her mother.

Susan, however, still suspected him. He was slightly longer than his brother and never looked like the rest of the family, with his striking golden hair.

Her eldest daughter excavated something and on the day her mother was born, a copy of all the births registered in the local area was found.

The next child in the list registered at the same NHS Hospital was the same surname as the person who contacted him through the lineage website.

This cannot be a coincidence. Only possible explanation was a mistake or mixture in that maternity ward more than seven decades ago.

Recently such cases were unheard of in the UK, although there are a handful of examples in other countries.

Today, standard practice in NHS is to keep two restbands around infants’ ankles immediately after birth and keep the mother and child together through stay in your hospital.

Maternity care was very different in the 1950s. Infants were often separated, kept in a large nursery room and care was taken by the rights.

Jason Tang from London’s legal firm Russell Cook says, “The entire system was very sophisticated,” from London’s legal firm Russell Cook, who is representing Susan.

“It may be that the employees did not immediately attach a card or tag, or that it simply fell and put back on the wrong child or wrong cradle.”

From the late 1940s, Britain also saw a post after a war, with more pressure on busy maternity services in the newly formed NHS.

Susan is already one of the first people to receive compensation – the amount is not being disclosed in such a case.

Before joining the NHS Trust, he needed to conduct a second DNA test and accepted its historical mistake and gave “very cute” forgiveness.

Last year, BBC reports on another decades old case In infants swapped at birth, who came back again after someone was given a DNA test kit for Christmas.

Susan says that the agreement was never about money, but recognition was a mistake made all those years ago.

“I think you always want someone to blame, don’t you?” She asks.

“But I know it would be for the rest of my life. I just wanted a conclusion.”