A letter sent to parents said children were ‘acting out scenes from the game which include the strongest of sexual swear words’, ‘having conversations’ about sexual acts and ‘play acting extremely violent games that sometimes result in actual injury’.

Speaking to the South Wales Argus, Mr Morgan insisted the letter was simply a way of making parents aware of this trend, rather than criticising them.

Mr Morgan said: ‘I sent out the letter with some trepidation but I’m pleased I sent it because all the comments, as far as I’m aware, have been very supportive.

‘Until I went online and checked the content of this game, I thought it was just a bit of swearing and some shooting and I think some of the parents will tell you that they have been equally naive.