The girl finds a recording of her grandmother, Valerie, singing a jazz standard Love Is Here To Stay for her late husband Raymond, while searching through old records. The recording appears to have been lost and the girl decides to recreate it, using her Apple computer.

We see the young girl listening to the song over and over, trying to get it right as her family prepare for the festive season.

Then, on Christmas Day, Valerie finds a handmade card and a digitally remastered recording, A Duet, to which the granddaughter has added her own vocals, as well as a collection of touching photographs of herself and her husband.

The advert is a lovely reminder of how technology can unite rather than separate older and younger people.

New Apple Christmas advert tells story of teenage girl's powerful gift to her grandma