Are Tooting and Streatham stations secure? Until what time it's safe to travel by National Rail services?

victim of crime @ time anywhere, there no point worrying much.

stations in london have cctv , of streets long remain in populated areas , aware of flashing valuable personal items in wrong places , @ wrong times fine.

long take care,avoid quiet or places not visible rest of joe public , don't involved dodgy characters should fine.

maybe i'll need travel in late afternoon or in evening , reach tooting railway station or 1 of streatham railway stations (s.common or 1 in streatham high road).
risky if walk @ 8 pm in zone?
thank you

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