i am looking to change my front grill over from the busted one to the new one i have and looking for advice on how to change it can i change it with the bumper still on or does the bumper have to come off. any help would be grateful

Difficult for anyone to advise as we don't know what car you have.
Repost in the section for your model, including model details and you will get a good response.

its a fiat punto evo mylife 61 plate.