Broken timing chain

[Frank m]

Have a 1.6 petrol note that is about 10 yes old.timing chain has gone.is the engine cam safe.if so can chain be replaced without removing engine.

[Trevor]

I'm not sure if the engine is safe once the chain has gone and chances are the pistons have hit the valves
I would turn the crank so that the pistons are midway down the bores (remove plugs to check this is the case) and then I would turn the cam(s) cautiously to ensure there is free movement.
If not possible on any of these actions then chances are it has lunched the engine