The news will come as a boon to the sector, which suffered during the recession, and is an indication brands are increasing expenditure in live events.
The agency has increased staffing numbers to 150 in its headquarters in London to service the account wins.
"We have all experienced a very difficult time over the past couple of years so I am thrilled to have such great news both for us and the industry," said Jack Morton Worldwide EVP Julian Pullan.
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