Surrey Police say they received 15 calls about a smell of gas in the air this morning. Kent Police and Sussex Police also received calls about the problem. The source of the smell was later attributed to an accidental discharge from a factory in Rouen, more than 60 miles west of Paris.
Surrey Police said the smell is from an additive to the gas which has an unpleasant aroma, but is not toxic, and does not present any danger to the public.
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Tuesday's weather for the west of the region
Tuesday's weather for the east of the region
The Government has previously described the new coin - which enters circulation on Tuesday - as "harder to counterfeit than ever before".