According to Rishi Sunak, the government will take "whatever necessary" to protect the UK from spy balloons.
A "quick reaction alert force" of RAF Typhoon jets, according to the PM, was on standby 24 hours a day to "police our airspace.".
He was unable to provide more specific commentary, however, due to "national security matters".
After the US military shot down a number of objects in Western airspace, defence secretary Ben Wallace is conducting a security review.
A Chinese spy balloon was shot down by the US military on February 4 after flying over important military locations in North America. The object, according to China, was a weather balloon that went astray.
The three additional "unidentified objects" have since been shot down across North America.
The US military shot down an unidentified "car-sized" object on Friday off the coast of Alaska while it was flying in US airspace.
The unidentified object was flying high over northern Canada, according to Canadian Prime Minister Justin Trudeau, who claimed to have given the order for a US warplane to shoot it down on Saturday.
On Sunday, an "unidentified object" was also brought down by US fighter jets over Michigan.
On Monday, Mr. Sunak said, "People should be reassured that we have all the capabilities in place to keep the country safe.
We have something called the quick reaction alert force, which consists of Typhoon planes, which are kept on standby 24 hours a day, 7 days a week to police our airspace, which is very crucial. ".
Earlier, Richard Holden, the minister of transportation, said it was "possible" that Chinese spy balloons had already flown over the UK.
He claimed that the UK government needed to deal with Beijing in a "robust" manner because it was "concerned" about what was happening in the US.
The UK is "well prepared," according to Downing Street, to handle security threats to British airspace, with threats being evaluated "case-by-case.".
The UK's approach to China will be reviewed as part of the update to the ongoing security review, according to the official spokesman for the prime minister.
According to the spokesman, "China poses a systemic challenge to our values and interests.".
"It is a challenge that becomes more pressing as authoritarianism increases.
The spokesman said, "You will be aware that we are updating the Integrated Review and that it will take into account some of these evolving challenges we are seeing.
The UK and its allies will "review what these airspace intrusions mean for our security," Mr. Wallace stated on Sunday.
The Defence Secretary stated that this development is yet another indication of how the nature of the world's threats is deteriorating.
China is "exploiting the weakness of the West" with the potential spy balloons, according to Tobias Ellwood, the chairman of the Commons defence select committee and a Conservative.
