After the demise of his parents in his early teen years, he left to pursue his studies in General Engineering at the University of Leicester, discovering not only his passion for caves but also the love of his life, Lilian Olds. They married and had three children. Lilian's unwavering support enabled Andrew to balance cave exploration, career, and his education.
In 1973, a position with the National Coal Board took him to the University of Leeds for a second degree. A top-class varsity and a renowned caving club made this decision easy for Andrew.
At 26, Andrew’s first expedition to Papua New Guinea caught the attention of the Royal Geographical Society, leading to an expedition in Mulu, Sarawak, in 1978.
This marked the beginning of a long-standing partnership with Sarawak and the initiation of the Mulu Caves Project, which saw Andrew coordinate and organise a series of Anglo-Malaysian expeditions, surveying 362km of cave passages in Mulu.