The Office of Fair Trading has launched an investigation into games on phones and tablets that are free to download, but could end up costing parents hundreds - even thousands - of pounds.
It follows concerns that children could be tricked into spending money on upgrades without realising the cost.
More top news
From Sierra Leone to Cyprus, 8,500 Christmas boxes were sent out to every serviceman and woman from the UK.
Thousands of people have switched off their Christmas lights as a mark of respect for the victims of the Glasgow bin lorry tragedy.
A woman who suffered 96% burns in a coach crash in the French Alps has made an extraordinary return to the slopes.