The bank manager that davetidza refers to above was John Pull, who worked at the Durrington branch of Lloyds Bank and was shot dead on 10th November 1960 during an armed raid.
See the following for details of Neolithic flint mines:
"The Neoloithic Flint Mines of England" by Martin Barber, David Field and Peter Topping, published by English Heritage, 1999
"Flint Mines in Neolithic Britain" by Miles Russell, published by Tempus, 2000
"Rough Quarries, Rocks and Hills - John Pull and the Neolithic Flint Mines of Sussex" edited by Miles Russell and published by Oxbow Books, 2001
"Mining and Materiality - Neolithic Chalk Artefacts and their Depositional Contexts in Southern Britain" by Anne Teather, published by Archaeopress Archaeology , 2016