The Gas Safety body has been warning the public how to avoid the silent killer that is carbon monoxide poisoning.
Here are the six signs of poisoning from the dangerous gas:
- Loss of consciousness
More top news
Kerrie Gosney brings you Saturday night's forecast
Showers becoming heavy and thundery Saturday afternoon. Drier for a large part of Sunday
Robert Hodgson, from Stanley, County Durham, committed the offences on the girls, aged as young as five or six, up to the age of 13.