Travel deals publisher Travelzoo has increased the number of subscribers to its Top 20 e-mail by 20% over the summer and is now reaching 600,000 users a week.
The continued growth in the number of sign-ups to the Travelzoo e-mail comes just 18 months after its launch in the UK market.
Europe managing director Chris Loughlin said click-through rates are currently running at 50% and the number of advertisers using the website and the bulletin has reached more than 150 since April 2005.
Earlier this year Travelzoo saw off the threat of a new entrant into the sector when US rival Shermans Travel launched and closed its UK office and bulletin within four months.