John Lewis Christmas MK II. Made grown men cry. Me included. Massively resonated with the nation. On all the levels I hoped it would when writing it. Alison Limerick performed the NYE Graham Norton show. Pretty decent cultural resonance. 
 
Credit to the Saatchi team for birthing it unscathed, Brodie King, William John, Franki Goodwin and Pete & Ollie. Shot by Jonathan Alric. Credit: Creative