A small selection of tributes from some of the people that he volunteered with at Explosion: “a very nice chap with a great sense of humour.” “a source of wisdom and knowledge for us all. He will be greatly missed.” “one of life’s gentlemen.” “one of the best.” “a lovely man and always happy to share his knowledge” “such a lovely man and greatly respected.” “a real gentleman ... His unsung knowledge and commitment to Naval History will be greatly missed.” “Though modest, John was great company with an infectious enthusiasm, an engaging optimism and a positive outlook on life.”