I want to change my silver filling

I have 7 silver fillings mainly on my back teeth and every time I laugh or when i am talking to somebody I am aware that people can see these and they have been bothering me more lately since starting my new job. Is it possible to get these replaced with white fillings on the NHS?
If you are really worried about the silver filling then you can change it into a GIC or a composite filling. if the cavity is small GIC filling can be given or if the cavity is larger than composite restorations can be given.

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