We have met the law that protects whistleblowers who engage in spilling of the beans. See, for example, http://www.breakinglaw.co.uk/2017/05/power-to-whistleblowers.html
As a respite from Brexit,new whisleblowing law comes into force on 05 November 2019 in the form of the Public Interest Disclosure (Prescribed Persons)
(Amendment) Order 2019 (SI 2019/1341) It follows the annual review of the prescribed
persons to whom workers can whistle an unhappy tune. The Commission for
Equality and Human Rights is added as a prescribed person and the matters which
whistleblowers can report to the European Securities and Markets Authority,
Financial Conduct Authority and Welsh ministers are updated.