The arrests were made when more than 100 officers searched 19 premises.
Police suspect that those arrested are part of a criminal network involved in prostitution and people-trafficking.
It is alleged the network operates by trafficking women from abroad, the majority from Thailand, and then coercing them to work as prostitutes.
Up to 110 officers are involved in Operation Gib, led by the Metropolitan Police with support from Surrey Constabulary and Norfolk Constabulary.
Police believe criminals have been using an internet escort agency as a front for organised prostitution...
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