The balloon was first rolled out during protests in London in 2018 during an informal Trump visit in July.
In an interview at the time with The Sun, a British tabloid, Trump took offense at the balloon, suggesting he would bypass the city because of it.
"I guess when they put out blimps to make me feel unwelcome, no reason for me to go to London," he said in the interview. "I used to love London as a city ... I haven't been there in a long time, but when they make you feel unwelcome, why would I stay there?"
After an online petition campaign, London Mayor Sadiq Khan, a fierce critic of Trump, granted permission to allow the blimp to fly Tuesday on Trump's second day in London at scheduled protests, but the Metropolitan Police Service still has to sign off on it. Police officials are expected to announce their decision Monday, according to the Huffington Post.
The Trump balloon is also expected in Ireland later this week, when Trump makes a stop in Dublin, the Irish Times reported.