There has been a major increase in the number of people suffering carbon monoxide poisoning, according to new figures.
Corgi, the national watchdog for gas safety, says that in the first four months of 2007 there were 40 incidents, 48 per cent up on the same period last year.
It says there were 50 deaths and 218 injuries from carbon monoxide poisoning in the 16 months between January 2006 and April 2007.
Corgi has now has published a new map highlighting the worst incidents of exposure to the deadly gas and pinpoints the regional hotspots.
People in Yorkshire, Wales, the North East and the Midlands are the most at risk of suffering carbon monoxide poisoning and Corgi is worried too many people are ignorant of the threat.
It says that while 90 per cent of the country has a smoke alarm, almost three quarters of the UK does not have a carbon monoxide detector.
Corgi added that while homeowners should have all their gas appliances checked every year, 15 per cent of people have never had any of their appliances checked.
It warned that the most common cause of death through carbon monoxide poisoning comes from faulty or poorly maintained gas appliances.