Next, in December 2022 the fourth project will start. We will test the support package and the changes we've made in a randomised feasibility study. We'll be working with four or five NHS mental health trusts, this time, and will recruit a minimum of 64 participants. One group of participants will receive the new support package and the other group will continue to receive care as usual. At the end of the study we will compare the two groups to see if our package of support has helped more people to change their smoking behaviour, in comparison to the care that is currently provided. We'll also look at if the support package can de delivered in practice, if participants are happy to receive the intervention, and if our processes work.