The agencies won the Grand Prix at a ceremony last night (Wednesday), with judges appraising work from 2012 onwards, including "The long wait" and last year’s "Man on the moon".
How Monty won Christmas for John Lewis 
The ads were praised for driving sales up by an average 16% during the Christmas period and producing more than £8 of profit for every £1 spent. They helped boost John Lewis’ market share to a high of 29.6%. Christmas now accounts for 20% of the retailer’s annual sales and 40% of its profits.
This is the second time Adam & Eve/DDB and Manning Gottlieb OMD have won the Grand Prix for their work on John Lewis. The two shops were triumphant in 2012.
Chairman of judges Dianne Thompson, former chief executive of Camelot, said: "This is the most high-profile marketing campaign in the UK in the most commercially important time of year. But it isn’t just ‘nice to watch’; it halts the nation, it has become part of our culture and, most importantly, it drives business success."
Adam & Eve/DDB was the most decorated agency this year, picking up Effectiveness Company of the Year, a gold for Save the Children, silvers for John Lewis Insurance and Wall’s, and a bronze for Volkswagen Commercial Vehicles.
BBDO was named Effectiveness Network of the Year.
Read more: Key marketing lessons from the IPA Effectiveness Awards
Winners list
Grand Prix
John Lewis, The gift that keeps on giving: John Lewis Christmas advertising, 2012 – 2015 by Adam & Eve/DDB and Manning Gottlieb OMD
Best Commercial Effectiveness for Good (President’s Prize)
Dove, Beautifully Effective: How Dove turned cultural resonance into ROI by Ogilvy
Effectiveness Network of the Year
BBDO
Effectiveness Company of the Year
Adam & Eve/DDB
Best Dedication to Effectiveness (The Simon Broadbent Prize)
Unilever
Best Multi-Market
Snickers, Thinking like a Hollywood blockbuster by AMV BBDO
Best Small Budget
Narellan Pools, Diving into big data for Narellan Pools by AFFINITY
Best International (The Tim Broadbent Prize)
Speeding (New Zealand Transport Authority), Mistakes by Clemenger BBDO Wellington
The Channon Prize for Best New Learning
The Economist, Raising eyebrows and subscriptions by Proximity BBDO London and UM London
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