Advice and information regarding odour complaints around Selsey and the south coast

The smell is described as strong and unpleasant like a 'rich, potent gas smell' or similar to rotten eggs.

It has been reported along the south coast of England, including Chichester, Bognor Regis and Littlehampton as well as Kent, and parts of Surrey and London.

The smell is believed to be caused by a gas leak from a chemical factory in Rouen, France, which the wind has carried across the English Channel. 

While the odour has caused concern and has prompted calls to emergency services, it is not considered dangerous and does not pose a health risk.

The gas contains mercaptan, an additive used to give gas a detectable odour, even though natural gas itself does not have an odour.

This is not the first time a smell from France has affected the south coast. In 2013, a similar incident also occurred.

Please do not call the emergency services unless you suspect a gas leak in your own local area. 

If you suspect a gas leak in your area you need to contact your gas provider and then emergency services if needed.

Date posted: 16 July 2025