Coolant Level Going Down

Hi Can anyone help please?

MGTF 3003

Had my PRT replaced about a year ago and have previously had one of the underfloor pipes replaced when it broke. Ever since the PRT replacement I have been losing some coolant. I topped up about a week ago and the level is about half an inch down today. No over heating and no creamy oil so hopefully not HGF.



Any ideas?

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