The judges awarded a Silver Mobile Lion to 'The Next Photo', a campaign by Wunderman UK for Child Eye Cancer Trust, and a Bronze Lion to 'Tweet to Eat' by Abbott Mead Vickers BBDO for PepsiCo.
The haul is one bronze short of last year when the UK won a total of three Mobile Lions.
Google Mountain View took home the Grand Prix for Google Cardboard, which turns any mobile into a virtual reality device using a cardboard headset. John Lewis used the platform in its 2013 Christmas campaign.
The big agency winner of the ceremony was R/GA New York, which picked up three Gold, three Silver and five Bronze Mobile Lions.