I'm currently setting up a study evaluating a clinical intervention for looked after children. I'm aware that there are quite complex issues around gaining consent with this population (incl. consent from local authorities, foster-carers, birth families as well as the young people themselves), and considerable challenges in doing this in a timely way, if the study is a clinical one and we don't want to delay access to services. Is there anyone out there who has experience in this area who'd be willing to share their experiences? Our study is in the UK, but would be interesting to hear about situation in other countries too.