The objectives of the informal expert meeting were to: a) Inform the European Commission’s work on loneliness b) Exchange and share knowledge on loneliness interventions and what works to tackle loneliness among researchers, NGOs and policy makers c) Build a network of intervention experts Several key lessons and recommendations were drawn from the meeting: First, based on a recent meta-analysis, presented in the meeting, loneliness interventions are effective although it is not possible to identify a specific intervention with a large effect on loneliness reduction. In other words, there is no “one size fits all” solution to loneliness. Further research with solid methodological quality and larger number of participants is needed to deepen the understanding on what works to prevent and mitigate loneliness in different contexts. Second, several good examples of loneliness interventions across the EU already exist, as presented in the meeting, which can provide important lessons learnt for others in the field both from the intervention design and evaluation point of view. Finally, the meeting put an emphasis on collaboration and dialogue between researchers and practitioners as a key way to develop effective solutions to tackle loneliness and to transfer the current attention into more knowledge that will benefit all. Meeting report 11 MARCH 2022Informal Expert Meeting on Loneliness Interventions Slides Joan R. Riera, Barcelona City Council 15 MARCH 2023Barcelona’s Strategy against Loneliness: elaboration process and strategic lines Maria Lähteenmäki, Tuuli Albekoglu, HelsinkiMissio 15 MARCH 2023HelsinkiMissio’s loneliness intervention programme – an individualised approach to reducing loneliness Jolanda van Gerwe, Join Us Foundation 15 MARCH 2023Reduce Loneliness among Youth – best practice from the Netherlands Mathias Lasgaard, DEFACTUM, Central Denmark Region 15 MARCH 2023Are loneliness interventions effective in reducing loneliness? Evidence from a review of over 130 interventions Jannis Kuhlencord, Rahel Herczeg, Togetherness Hub 15 MARCH 2023Flash presentation on Togetherness Hub