Reform UK leader Nigel Farage previously argued that political leaders must face accountability for content distributed on their official channels.
"If people post on social media things that are racist or inciteful, they nearly always get a knock at the door, charged, and that's right and proper," Farage said.
Farage noted that public figures should take responsibility for online actions.
"We all get things wrong in life, we all make mistakes in life and what we do afterwards is we apologise," he said.
Metropolitan Police officials reiterated their commitment to protecting public officials while confirming that no further action would be pursued in this case.
"We absolutely understand the reaction to this image being shared online, particularly in the context of increasing threats towards politicians," a Metropolitan Police spokesperson said.
The police statement emphasized the official reasoning for ending the review.
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"While there will be people who will argue that those who shared the image in this Instagram post should be subject to criminal action, our review has concluded that on this occasion, the threshold is not met," the spokesperson said.