Delegates The vast majority of those attending the session attend as delegates. They are the group for whom the session is organised. In the Autumn/Winter and Spring Sessions, the delegates are new to EYP (having been selected by their National Committee). On the other hand, the Summer Session is an opportunity for those who've already taken part in a session to return to EYP.

Chairs The chairs play a very important role in the session. They are there to guide the delegates, one chair leading each of the Committees, through Teambuilding and Committee Work through to the General Assembly. Being experienced EYPers, they are in a good position to empathise with the delegates, helping them along, encouraging and motivating the delegates to come up with and develop their own ideas. The team of chairs is in turn chaired by a Board, normally consisting of a President and two Vice-Presidents.

Journalists Sessions are as intense as 9 days possibly could be, and often leave little time to reflect and absorb. That is where the Session Newspaper comes in - it is produced every day of the Session by a committed team of journalists, "journos", who are also former EYP delegates. The team of journos is headed by an Editor, who chairs the team and is ultimately responsible for putting together the newspaper - which is then freely distributed to all the session participants. The articles, ranging from the sensible to the silly, both factual and funny, always make for an entertaining read.

Teachers At the Autumn/Winter and Spring Sessions, where the delegates are coming to EYP for the first time they will often be accompanied by one or two teachers. However, from Arrivals onwards, the teachers have minimal interaction with their students, beyond periodically checking on their well-being. But the teachers have a full Teachers' Programme, with workshops on areas of interest such as 'citizenship', interspersed with opportunities to explore the culture and ambience of the Session city and its environs.

Organisers Without the organisers, there would be no session - they are the ones who have been making preparations for months, even years, to ensure the 9 days of the Session go as smoothly as possible for all the participants. Their work continues right up until the last delegate has left, and they work tirelessly and without reward, other than the knowledge of what their efforts have achieved over the course of the Session. The organising team consists of those who've been to a previous session in one of the above roles, and is often augmented by 'adults', normally members of the National EYP Committee in that country.