The photos show happy teenagers with aspirations of joining the army, the RAF or going to university.

But they don’t show the grieving mothers who are trying to come to terms with the fatal consequences of the choking game.

Anne Phillips, of Somerset, who is spearheading the choking game awareness campaign suspects there are many unrecorded victims.

Her 18-year-old son Mike died 16 years ago after hitting his head whilst playing the choking game at a Halloween party in Canada.

The group of mothers hope to raise awareness so other parents and teachers know the signs to look for.

Bloodshot eyes, headaches, red marks around the neck, and anything tied or hung around the bedroom that has no purpose to be there, are among the warnings they list.

Jo Mison, mother of Tyler, who is thought to have died playing the game last September, submitted a petition to Downing Street, which recieved 882 signatures and calls for education in all schools to prevent the game.