A postcard delivered 121 years after it was sent has reunited a family.

Staff at Swansea Building Society in Wales were astonished when the card, dated August 3, 1903, arrived on August 16 this year.

It was addressed to a Miss Lydia Davies, who likely lived at what is now the society's head office, from her brother Ewart.

After seeing the story two families came forward and discovered they were related.

Several of Lydia and Ewart's descendants have now met for the first time at the West Glamorgan Archive.

Ewart’s grandson, Nick Davies, from West Sussex, was joined by Lydia’s great-nieces, Helen Roberts and Margaret Spooner, as well as Lydia’s great-granddaughter, Faith Reynolds.

The relatives, who travelled from different parts of the UK, were thrilled to meet each other and discover their shared ancestry.

Nick described the experience as "extraordinary''.

The 121 year old postcardThe 121 year old postcard (Image: Swansea Building Society / SWNS)

The 65-year-old said: "It’s like a family reunion, where the only connection you have is a common ancestor dating back to over a hundred years ago."

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He shared that Ewart, who would have been just 13 at the time, was spending his summer holidays at his grandfather’s house in Fishguard when he wrote the postcard to his sister Lydia, who was known to collect them.

The postcard, which contains a message apologising for not being able to "get the pair of these," has been interpreted by the family as referring to a pair of postcards.

Ewart also mentioned in the postcard that he had about ten shillings "in pocket money, not counting the train fare, so I am doing alright."

Ewart and Lydia were two of six children born to John F. Davies and Maria Davies. Mr Davies ran a tailor’s shop from 11 Craddock Street, Swansea, where the building society now stands.

Lydia’s great-nieces, Helen Roberts and Margaret Spooner, from Swansea, recognised her in the story and connected with Faith Reynolds, Lydia’s great-granddaughter, who had been unaware of her relative's siblings.

The postcard will be preserved at the West Glamorgan Archive, where it will be available for the family and the public to view.