My mother's maternal Aunt Marianne or, possibly Mary Anne, emigrated with her family to Australia when my mother was a child. (Mum was born in 1911, so maybe not even a £10 Pom.) She wanted to help my grandmother, who had a very large family, and offered to adopt one of her older daughters. My grandmother refused. They remained in touch, although it must have taken ages for letters to travel such a distance.
I was young woman when some of Aunt Marianne's descendants visited England with their families. My aunties and cousins got on with them really well. As time has gone on we have lost touch as our older generation is no more.
Now that I live in New Zealand, they are all, of course, "just across the ditch" – the "ditch" being about 2,600 miles and a about 5 hours away by plane.