While John Lewis and BBC One continue to command much attention, Debenhams’ Christmas spot is emerging as one the most impressive of this season.

Commissioned by London agency J Walter Thompson and featuring a cameo from Ewan McGregor, who also narrates the film, it tells the story of a man’s quest to find a woman he met on a train, with only her discarded glittery shoe to go on.

Boutique music composition and supervision company Eclectic and composer Chris White ...