Searching for living relatives of Katherine Mary Larkins nee Mullins 13 October 1917

Details from birth certificate

My name is Michael Larkins and my mother Katherine Mullins was born in Cork on the 17th October 1917.

In the mid 1970's my father and mother visited Ireland from Australia to meet with her surviving relatives.

Her eldest brother was one Patrick Mullins and if I recall correctly she had one sister living in Bexhill and Streatham in England and she was married to Kenneth Waters. My mother had several sisters in Ireland and during her trip I recall meeting some of them. My mother had one sister Joan Mullins who migrated to Australia in the early 1920's with my mother and their maiden aunt Margaret O'Brien.

My mother's parents were John and Mary Mullins.

My question then is could you advise me on the best method of tracing any surviving relatives.

Our family is planning on visiting Ireland and would like to make contact with the younger Mullins generation.