Was at dulwich park playground today and saw a man just standing alone near the swings within the playground but without a child. He didn't seem to be with any family group and i was there long enough to see that. I was with my baby and didn't feel confident questioning him, although i now regret that. I know it seems over the top but i felt uncomfortable so just wanted to let people know - probably late 20s,white,glasses,short hair, dark clothes.