Can anyone provide information on these young minerals engineers?

This is a photograph taken in the Transvaal, South Africa in 1978. I supervised Anglo American vacation projects for a group of mineral processing students from UK Universities.

I would be grateful if anyone can provide information on these students- their names where not known, and what became of them after graduation.

I know that 2nd left is David Binns, who now runs a minerals shop in Sussex, England; 3rd left is Neil Holloway who was then with Anglo American Coal; standing is Dave Dew who rose to the top in biohydrometallurgy research in South Africa, and on the far right is Martin Moloney, who I last saw several years ago in Australia.