In September 2023, Wales passed legislation making the maximum speed limit 20mph in built-up areas. How are speed limits linked to public health? How can researchers engage with governments to enact public health research? And how do you deal with the situation when there is a huge online backlash to your work? Dr. Sarah Jones from Public Health Wales joins Gavin to discuss how her research was implemented, how it's gone so far, and what's next.

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