
InBev called the pitch in July for the lower-strength version of Stella Artois. The review also originally involved TBWA.
The campaign, which will involve TV and digital, is set to launch this November.
It is understood that InBev has only briefed Mother to launch the new variant in the UK and has not yet decided which agency will handle advertising after the beer's debut.
London has worked with Stella Artois for the past 25 years and continues to handle the main 5.2% variant and Beck's brands.