In the tv series, the tunnel, the Brits cops like their public servelience cameras. The french do use them because of privacy issues.
.." Although some may feel like public surveillance is an invasion of privacy,
laws that prohibit surveillance in public places are few and far
between, and may be limited to geographical areas. For example, in New
York, police may only use video surveillance footage as part of an
investigation into the alleged criminals after obtaining a warrant from
local authorities. "