Modern slavery and human trafficking are more prevalent across Britain than previously thought, the National Crime Agency said Thursday, because more international gangs realize they can make significant sums of money from it.

The NCA said there are 300 live police operations into forced labor, sexual exploitation and domestic servitude, problems that it said affects every large town and city across the country.

"We've been shocked by the extent of it," Will Kerr, the NCA's officer in charge of tackling such criminality, told reporters. "This is a growing problem. This is 2017, this is not acceptable in any way, shape or form."