The number of British people smoking e-cigarettes has more than doubled in just two years, according to new data from Kantar.

The figures coincide with Wales’ decision to ban the use of e-cigarettes in public places under a new Public Health Bill.

The proportion of e-cigarette smokers has risen from just 3.05% in 2013 to 6.77% this year, the data reveals.

In France just 3.4% of people smoke e-cigarettes, while the figure falls to 2.6% in Spain.

Meanwhile, the percentage of people smoking regular cigarettes has continued to decline, from 21.15% in 2013 to 17.39% in 2015.

The World Health Organisation (WHO) estimates that the e-cigarette industry has grown from “just one manufacturer in China in 2005 to an estimated £3bn global business”.