That Camping & Caravanning link is good. In fact, i've decided to cut and paste it here 
Safety Tips
Never take a barbecue into a tent, awning, caravan or motorhome. A warm, smouldering barbecue gives off plenty of poisonous carbon monoxide (CO), which can kill.
Never use a fuel-burning appliance to heat your tent or awning. Gas and kerosene heaters ? unless they are permanently fitted in a caravan or motorhome ? should only be used outside. Stoves and barbecues are designed for cooking not space heating.
Never run a gas-, petrol- or diesel-powered generator inside a caravan, motorhome, tent or awning.
Don?t cook inside your tent or awning, unless there?s an area specifically designed for this purpose and you?re sure there is adequate ventilation. To work safely gas, meths and petrol stoves need more ventilation than your tent or awning is designed to provide and there?s also the risk of fire.
Don?t use any other gas, charcoal or liquid fuel appliances inside a tent or awning. Gas-powered fridges and lamps, for example, also need plenty of ventilation to prevent them producing poisonous carbon monoxide. Tents and awnings aren?t generally designed with this in mind.
Don?t rely on a carbon monoxide (CO) detector to keep you safe in a tent or awning. They may be useful at home, in a caravan or in a motorhome, but they are not designed for the conditions found in a tent or awning.
Always have gas appliances in your caravan or motorhome serviced regularly.