The group said its interim results, due on 25 November, would be significantly ahead of expectations because deliveries of the new Iraqi currency had started earlier than previously forecast.
Shares rose to 313.5p, close to the 52-week high of 315.18p recorded this time last year, before settling at 307.5p, up 6.4% from the start of todays trading.
De La Rue also said its cost-reduction programme was proceeding as scheduled.
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