Retailers could be jailed for selling 12-rated video games to children below that age under proposals being considered by parliament.

Currently only 15 and 18 age ratings are enforceable by law but earlier this month the government began the process of extending the law to 12-rated titles. There is a maximum sentence of six months and a fine of up to £5,000.

The Entertainment Retailers Association said most retailers already treated the 12-rating as mandatory. “There have been almost no instances of 12-rated games being sold to the under-12s,” said ERA director general Kim Bayley. “ERA members have dealt with age ratings and trained staff accordingly for years.”