I'll be visiting friends in the UK for 2 weeks (and then going back home to the US). They've invited me to volunteer with a childrens' summer camp for a week as I'm an educator in the States.
I'd be happy to volunteer at their camp, but I'm not sure if I need to apply for a visa. As a US citizen with a passport I know I can stay in the UK for up to 6 months, but I'm only visiting for 2 weeks and hoping to volunteer for 5 days. Do I need to apply for a visa, and could anyone give me a clue as to which one?