Media roundup: McDonald's, Mars, BETC London, Schweppes, Tesco

We bring you the buzz from the wider media sphere, across the world and across the web. This week: McDonald's launches Olympics promotion; Mars kicks off Euro 2012 campaign; BETC London wins Samsung project; Schweppes in summer campaign launch; Tesco prepares Clubcard overhaul

McDonald's to introduce Olympic happy meal promotion

McDonald's is launching a 'Mascotathon' happy meal promotion on Wednesday (18 April), featuring the London 2012 Games characters, Wenlock and Mandeville.

Mars kicks off its Euro 2012 ad campaign

Mars has launched its Euro 2012 TV ad, which features a Mars bar-eating steward producing heroic saves to defy the Premier League's top marksman, Robin van Persie.

BETC London wins global project for Samsung Smart TV

Consumer electronics brand Samsung has awarded BETC London a brief to produce a global digital campaign for its new range of Smart TVs.

Schweppes summer campaign celebrates British heritage

Schweppes, the Coca-Cola owned soft-drinks brand, is launching a summer campaign today (16 April), to promote its British heritage.

Tesco prepares Clubcard overhaul ahead of strategy announcement

Tesco is to overhaul its Clubcard scheme with the launch of a 'Love loyals' programme designed to reward its best customers and the roll-out of a last-minute deals service.