John Bouchier-Hayes competed in the fencing at three successive Olympic Games – Tokyo 1964, Mexico City 1968 and Munich 1972 – spanning a decade of Irish Olympic fencing and serving as team captain at the 1968 Games.

He was introduced to fencing as a first-year student at St Conleth’s College, Ballsbridge – one of the few Dublin schools that featured fencing on its curriculum – and almost immediately joined the Setanta Club where he benefited from the coaching of Paddy Duffy. At the time, his main sporting interest lay in rugby football; a bad leg break requiring almost twelve months of hospitalisation ended his association with contact sports and fencing became his primary sporting outlet. Listening to radio commentary of Ronnie Delany’s victory in Melbourne planted the seed of Olympic ambition.

At the 1963 World Junior Championships in Ghent he and Michael Ryan both achieved top-sixteen finishes – a first for Irish fencing. He had commenced his accountancy training as an articled clerk with the Griffin-Lynch firm at the time of Tokyo, the company allowing him leave for the Games.

At Tokyo he qualified from his first-round pool in the épée – the furthest he or Ryan progressed in their specialist events – before his second-round elimination. At Mexico City as team captain he competed in the foil, épée and sabre events and submitted a detailed report to the OCI after the Games identifying the lack of international competition as the central challenge facing Irish fencing, noting that errors which could only be eliminated through sustained international experience were proving costly.

He returned for a third Games at Munich 1972, competing in the individual foil and épée.

He later became one of Ireland’s most respected accountants and a distinguished figure in Irish public life.