When your famous, but deceased, husband was well known for his strong anti-authoritarian stance, can you ever allow his image to appear in an advert without looking like you’re shagging the corpse? John Lennon, one part of the Beatles, fervent anti-war campaigner and general ahead of his time radical, is now flogging Citroen cars thanks to permission from his controversial wife Yoko Ono. Their son Sean has now tweeted to defend the situation: "She did not do it for money. Has to do w hoping to keep dad in public consciousness. No new LPs, so TV ad is exposure to young." And "Look, TV ad was not for money. It's just hard to find new ways to keep dad in the new world. Not many things as effective as TV." The ad is below, let us know what you think.