JOHN HEAP was a distinguished and internationally respected polar diplomat and scientist who contributed significantly to establishing the regulatory frameworks under the Antarctic Treaty to safeguard and protect the vulnerable Antarctic environment, limit exploitation of its marine and mineral resources and to sustain the freedom for scientific exploration.

In the 1970s world demand was increasing for fish and squid, particularly in the Far East, and attention turned to the abundant stocks in Antarctic waters. To prevent a repeat of the devastating earlier predations on fur seals and whales, signatories to the Antarctic Treaty (which had come into force in 1961) agreed to establish an innovative ecologically based conservation regime.

Heap led the British negotiations but played a wider and influential role. Virtually alone among other diplomats in respect of direct scientific experience and knowledge of the Antarctic, he was able to skilfully turn high-minded intentions into realistic and practical measures. That the 1982 Convention on the Conservation of Antarctic Marine Living Resources (CCAMLR) has had lasting impact is due largely to Heap’s canny, frequently understated but pragmatic shaping.

CCAMLR was an important precedent when the spotlight turned to minerals exploitation in Antarctica during the 1980s. The shrill and increasingly interventionist tactics of the environmental lobby, especially Greenpeace, made the diplomatic manoeuvrings sensitive and highly visible. Heap was involved in facilitating the serpentine negotiations which started out to regulate mining and ended in 1988 with a protectionist regime embodied in the Madrid Protocol and its 50-year moratorium on exploitation.

That he was able to work with the environmental lobby more effectively than many other diplomats was thanks to his scientific credentials, track record with CCAMLR and close working relations with, and ability to field, experts from the British Antarctic Survey.

John Arnfield Heap was born in 1932 in Manchester. His early education at the Quaker-founded Leighton Park School in Reading instilled in him values of equity, tolerance and respect for the individual and a consuming interest in other people.

He studied geography at Edinburgh University and was captivated by the polar regions, leading a university expedition to Arctic Norway in 1953. In 1955 he went to Cambridge as a Falkland Islands dependencies survey research student at the Scott Polar Research Institute and Clare College. He gained a PhD for work on sea ice in the Weddell Sea, undertaking two Antarctic summer shipboard programmes in 1955-56 and 1956-57, the latter with Sir Vivian Fuchs’s Commonwealth Trans-Antarctic Expedition. From 1962 to 1964 he continued research at the University of Michigan, at that time a leading institution in the US for the study of glaciology under the energetic leadership of Jim Zumberge. In 1962-63 he was a member of the University of Michigan Ross Ice Shelf studies project. In 2000 a 17km-long glacier in Victoria Land, Antarctica, was named after him by the US Committee on Antarctic Names.

Already under the influence from his Cambridge days of the mercurial Antarctic veteran Dr Brian Birley Roberts, Heap returned to the UK to join Roberts in the Foreign Office research department, took over from him as head of the FCO’s Polar Regions section in 1975 and was administrator of British Antarctic Territory from 1989 to 1992.

While his primary focus on Antarctica was these territorial claims and an international treaty, his remit also covered the Arctic. He encouraged active engagement, attended meetings and established a post in the polar regions section with special responsibility for the Arctic. His comprehensive knowledge and experience led him to conceive and write much of the Antarctic Treaty Handbook — an essential guide to the complex and growing web of procedures, documentation and practices that had come into force concerning the southern continent; it was a godsend to new diplomats and new country entrants into the Antarctic Treaty system.

He wrote extensively on Antarctic Treaty matters; his prose was always clear, concise and original. His opus provides a rich source of information and analysis of the Antarctic Treaty and its impacts. Upon retirement from the FCO in 1992, Heap’s contributions were recognised with his being appointed CMG.

He returned to academia as the director of the Scott Polar Research Institute, a post he held until 1997. During this time Heap worked closely with the University of Cambridge authorities to better establish a sustainable future for this specialised research department to meet the growing international demand for polar expertise and information. Being met with little response to his requests for funds he set to work to raise them himself. Through a successful campaign he was able to construct the magnificent west wing and its Shackleton Memorial Library, which has enabled the institute to remain at the forefront of polar research.

Heap also fostered the need to preserve the heritage of Antarctica through conservation of the huts and artefacts of successive expeditions. He became chairman of the UK Antarctic Heritage Trust, whose patron, the Princess Royal, took a keen interest and visited the Antarctic courtesy of the trust’s sister organisation in New Zealand. He was also chairman of the Trans-Antarctic Association.

Constantly cheerful and with an engaging personality, Heap maintained an active and intelligent interest in all matters polar to the very end, keenly fostering a younger cadre of polar scientists and diplomats in whose progress he was always enthused.

He continued his association with glaciology, serving as treasurer of the International Glaciological Society for 30 years and was awarded the society’s Richardson Medal in 1999. Latterly he served as a Liberal Democrat district councillor for South Cambridgeshire.

He is survived by his wife, Peggy, whom he married in 1961, and their son and two daughters.

John Heap, CMG, director, Scott Polar Research Institute, (1992-97), was born on February 5, 1932. He died on March 8, 2006, aged 74.