Mrs Thatcher has come to see you today as she has just found out that she is pregnant. She is 32 years old and works as a cleaner. Apart from a slightly raised BMI of 27, she has no significant medical or surgical history. As you are filling out her maternity referral form she reveals that she recently started smoking again. She had smoked from the age of 16 but managed to successfully quit two years ago with the support of the smoking cessation service and Varenicline. Mrs Thatcher is aware of the risks to her health and that of her baby and is keen to stop. She agrees to a referral to the smoking cessation service.
Which one of the following statements with regards to the management of smoking cessation during pregnancy/breastfeeding is least correct?