Hi Pinky13,
Labello do a Sun Protect that has I believe an SPF 30.
Sephora have their own lip balm stick SPF 20
Boots usually sell a variety too.
But the best one I love is Elizabeth Arden 8 hour stick. SPF 15. For many years they were plain but now have started a range of tinted ones too. Although i'm not sure if they are easily accessible here, usually duty free.:)