Why not go back as staff when you're 18 or as a volunteer over Summer before you're 18? You can still take part in the activities etc.
I would recommend this to everyone by the way!!! But my question is why can’t we do NCS again because I really want to. I did the autumn ncs 2018 and it only lasted about 2 weeks in total and we didn’t have a grad party, whereas the summer ncs lasts 3-4 weeks and you have a grad party after it. Can I do the summer ncs if I have done the autum ncs, I paid £50 for the autumn one and missed out on things I would have done in the summer.