Carlsberg will continue to use its classic 'Probably the best lager in the world' ­slogan in the UK - despite the introduction of a new global strapline.

This week, the brewer ­revealed that it would be using 'That calls for a Carlsberg' to promote the brand globally sparking tabloid claims that it was planning to ditch the Probably tag.

But the brewer has told The Grocer that, while the new strapline will sign off TV ads internationally, the Probably slogan will continue to appear on UK ­packaging and advertising.

"The idea of dumping Probably in the UK would never happen," said Carlsberg UK communications manager Adam Withrington. "It's part of the DNA of the brand."

However, globally, the new tagline would be more easily understood than Prob­ably, Carlsberg claimed. "This launch is our way of getting our story out there to both our mature markets and our newer markets," said chief executive Jørgen Buhl Rasmussen.

The announcement was made as it unveiled its new global strategy this week and a packaging revamp.

The new-look cans retain the original logo and typeface, but the image of the Danish crown has been modernised, and midnight green and black added to the colour palette.

Carlsberg also revealed it had reformulated the lager using a new barley developed to keep beer fresher for longer. The company claimed that consumers would be unable to taste the difference ­between the old and new ­version, which is already in production and is being rolled out across all Carlsberg ­markets.

Staff at the Danish brewer's research centre said the use of Null-Lox barley, which has been developed by the brewer in 10 different versions to suit a range of climates, meant the beer could be stored in less than optimal conditions.

Null-Lox had good disease resistance and needed fewer pesticides, said the company, which expects to harvest 200,000 tonnes of the barley this year.

Carlsberg also announced it would be ­sponsoring Euro 2012 and launching a new campaign around the tournament.