Drivers throughout the county will not be allowed to smoke in private vehicles carrying under 18s after law change on October 1.

A Public Health England campaign, backed by Hertfordshire County Council, re-launches this week to highlight the hidden damage secondhand smoke in homes and cars can cause to babies and children’s health.

The campaign coincides with the passing of regulations to end smoking in cars carrying children in England by Parliament this week.

Teresa Heritage, cabinet member for Public Health and Localism, said: "This is a really significant step for protecting children from the dangers of secondhand smoke.

"More than 80 per cent of cigarette smoke is invisible and odourless, so no matter how careful you are, children still breathe in harmful poisons which cause serious health problems.

"If you are one of the two-thirds of smokers thinking about ditching cigarettes, call Hertfordshire County Council’s Stop Smoking Service.

"We know quitting may not be easy, but we understand what works to ensure you get the best chance of success and will be there for you every step of the way.

"If you are not yet ready to quit, but would like advice on how to cut down or to protect your family from second-hand smoke, we can help."

The law will come into force on October 1, and people failing to comply could face a £50 fixed penalty notice.

For help to quit smoking call 0800 389 3 998 or text Smokefree to 80818 and someone will get back to you.

For more information visit www.smokefreehertfordshire.nhs.uk or www.hertsdirect.org/healthinherts.