E-cigarettes and Cardiovascular Function

The nicotine strength of Group A (nicotine-inclusive e-cigarettes) cartridges will be 18 mg/ml of nicotine strength. All participants will receive up to 6 behavioural change support sessions over the 3-month intervention period.

Group B participants will receive nicotine-free cartridges for the period of the intervention. All participants will receive up to 6 behavioural change support sessions over the 3-month intervention period.

Group C participants will be referred to smoking cessation services where they will be expected to receive Nicotine Replacement Therapy and up to 6 behavioural change support sessions over the 3-month intervention period, as per current guidelines.