An Albury man has been reunited with his daughter after spending 51 years apart in opposite hemispheres.

Katie Bergin was nine months old the last time her 24-year-old father, Tony Brown, saw her in London.

Katie’s mum was taken to a home for unmarried mothers and asked to give up her daughter for adoption. She vehemently refused and eventually gave birth to Katie, in Liverpool.

“She told me that my dad’s name was Anthony Brown and he was originally from Wales,” Ms Bergin told 9NEWS.

The information proved to be little help in the search for her father, who had served in the RAF, moved to Australia by 1975 and remarried.

Ms Bergin contacted Fraser Kinnie of HeirHunter UK, who appeared on the BBC Family Finders Programme, he told her that the search would go far beyond the borders of the UK.

Ms Bergin told the Border Mail when she finally spoke to her father “it was a flood of tears – we both couldn’t speak”.

“He said to me, ‘It’s like the moon and the stars have finally arrived back on Earth’, and that’s what it’s like,” she said.

Ms Bergin has stayed almost two weeks at her 77-year-old father’s home, and soon plans to introduce him to his 21-year-old grand-daughter, Grace.