His predecessors were "Vicky" and "Low". As such, the views expressed in his cartoons were sometimes highly controversial; one 1970 cartoon that nearly led to the Evening Standard being closed by industrial action caricatured power workers, then on strike for improved conditions, as stupid, greedy and deaf to reason. JAK's cartoons frequently depicted negative views of Irish people. One cartoon, printed in 1982 as a comment on the Northern Ireland situation, depicted a film poster advertising "The Ultimate In Psychopathic Horror - The Irish" and caused Ken Livingstone, then leader of the Greater London Council, to withdraw all advertising from the paper.