the prison officers were disposed to join in a sympathetic strike, they would not be likely to be deterred from doing so merely by the fact that affiliation with industrial unions had been prohibited. 6. Nor do we think it is expedient to introduce legislation on the lines of the Police Act of 1919 expressly forbidding prison officers to be members of Trade Unions and making it an offence for any person to bring about or attempt to bring about a strike in the prison service. Such legislation would be highly controversial and there would inevitably be strong pressure for its extension to other essential workers.