If you are residing in a country requiring a visa to enter the UK, the establishment or school organizing the trip has to officially apply for a visa. Usually, since UK School Camp is a certified institution by the British government, our official invite containing the names of the students and the school application is enough for a visa. However, the consulate reserves the right to refuse the application when deemed necessary.
Ministries of education around the world accept UK School Camp as an official school trip owing to the official notice, and therefore deem attendance compulsory for students enrolled in the programme.