im going away for 3 months round the world and wondered what company would be best to go for for my travel insurance. im 21 and have booked my tickets through STA travel agency and wondered if I should just get it through them?

I would recommend Insure&Go, I get my annual multi-trip insurance, they cover loads of sports too like horseriding and scuba-diving which is why I use them. Check out their website www.insureandgo.com. Enjoy yourself!