This from my local council's website:
RE: Smoke Control Areas.
Dear Sir/Madam
As part of Stockport Councils continuing commitment to improve air quality for the residents of Stockport, the Council created Smoke Control Areas.
If you live in a Smoke Control Area, it is an offence to burn unauthorised fuels on an open fireplace, stove or similar appliance. Special fuels such as ‘smokeless coal’ have now been developed to burn on these appliances.
Wood or coal is classed as ‘unauthorised fuel’ and cannot ordinarily be burnt unless you own an ‘exempt appliance’.
Exempt appliances are appliances (ovens, wood burners and stoves) which have been exempted by Statutory Instruments (Orders) under the Clean Air Act 1993. These have passed tests to confirm that they are capable of burning an unauthorised or inherently smoky solid fuel without emitting harmful smoke. A list of exempt appliances and authorised fuels is available at
www.uksmokecontrolareas.co.uk
You are allowed to use kindling, such as paper or twigs, to start the fire; however we would recommend that you use this sparingly or use firelighters so that the amount of smoke is kept to a minimum.
Householders living in a Smoke Control Area could be fined up to £1000 for each offence of burning unauthorised fuel, such as wood or coal on an appliance that is not exempt under the above legislation.
Smoke, which may not be dark, can also cause a nuisance to your neighbours and is an offence under the Environment Protection Act 1990. A notice can be served and you may also be fined if further instances occur.
If you are not sure whether you live in a smoke control area, you should contact the Environmental Health Department on 0161 474 4284 or you can look on line at
www.stockport.gov.uk/environment
Here is the direct link to the exempt appliances pages for England: it also lists the type of fuel approved for use with the appliances:
http://smokecontrol.defra.gov.uk/appliances.php?country=e