You have all seen the fire safety adverts on TV and the one where your asked about your smoke detector...
Well your local fire service is offering free fire safety checks to your home and the fitting of new smoke detectors so go look up your local districts web page and click fire safety and book yourself a visit, they even come in uniform lol ;)

This is an area which interests me a lot.

Check out this Fire Safety article from Assured Fire:

Top Tips for Fire Safety in Your Workplace (http://www.assured-ltd.co.uk/open_article.php?id=49)

Hope you find it useful