The National Union of Students (NUS) is a voluntary membership organisation which aims to make a real difference to the lives of students and its member students' unions. They are a confederation of 600 students' unions.
ESN is the key volunteer student organisation in international Higher Education in Europe. Erasmus Student Network United Kingdom (ESN UK) is a not-for-profit student organisation representing local ESN sections (local assosications). Their mission is to foster student mobility in Higher Education, provide opportunities for cultural understanding and self-development under the principle of Students Helping Students. ESN UK aims at working in the interest of students who are spending parts of or their entire formal education at a Higher Education Institution in the UK. They are working on a volunteer basis in 22 Higher Education Institutions in the UK. All the sections of ESN UK together, help over 10,000 Erasmus, international exchange and local students every academic year.