This is the second instalment of the 2-part Christmas Special with Professor Mike Kelly. If you haven’t listened to part 1, why not do them in order!In part 1 of our discussion we covered Mike's own experience working in public health across a huge range of research topics from the prevention of non-communicable disease to end of life care, all of which have close links to behaviour change and other social matters.In part 2 we discuss the application of behaviour change theories in the real world. Mike speaks about creating NICE guidance and how evidence is, sometimes incorrectly, used when creating interventions. We also cover the issue of inequalities and how he personally uses behavioural science in his everyday life.  Enjoy the show and whilst listening, why not go to the BSPHN.org.uk to book your place at the 2020 Annual conference, taking place on 12th February? Finally, we at the BSPHN hope you have an amazing Christmas ?and New Year ?