judgement" over his tweet about the Duke and Duchess of Sussex's baby.
The tweet, which he later deleted but which has been circulated on social media, showed an image of a couple holding hands with a chimpanzee dressed in clothes with the caption: "Royal Baby leaves hospital".
The BBC 5 Live presenter was accused of mocking the duchess's racial heritage.
Baker claimed it was a "stupid gag".
The 61-year-old presented a Saturday morning show on the network.