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The azzy content will depend on its age.
Using asbestos in building became illegal in 2000 so if it was put up post that you'll be ok and can do what you want. There are products available that chemically soften the finish letting you remove it when it's damp therefore eliminating dust personally I wouldn't risk it in my house (at least not without air quality monitoring) but the option is there. Best practice is to skim or board over it.
I'd say kill it with fire but there is a possibility it contains asbestos so may not work.
Getting a decent plasterer to skim it is the easiest but not necessarily cheapest way to sort it.