Friends Southern Summer Events (commonly abbreviated to FSSE) is a Quaker organisation based in the South of England which caters two events for young Quakers each year: Southern Summer School (for 11- to 14-year-olds) and Senior Conference (for 15- to 18-year-olds).
Essentially they are spiritual gatherings where participants share in Quaker worship and develop their understanding of Quakerism, society and religion.
References
Friends southern summer events Wikipedia(Text) CC BY-SA