Sir Keir Starmer told MPs suspected that the arson attack on property related to him was “an attack on all of us, democracy and the values we represent.”
Conservative leader Kemi Badenoch condemned the attack as “totally unacceptable” at the start of the weekly clash of prime ministers.
Police are continuing an investigation into the fires in the north London property and cars related to Sir Kyle.
A 21-year-old man was arrested early Tuesday at an address in West Denham, southeast London, on suspicion of arson with the intention of endangering his life and was detained.
Scotland Yard said counterterrorism officials are working “at a pace” to establish the cause of the fire and “any potential motivation”.
On the Prime Minister’s question, Badennock told the Prime Minister: “When I say it’s not just an attack on him, but an attack on all of us and our democracy, I think I speak for the whole house.”
Sir Kyle thanked the opposition leader for his “right now” connection with him to provide her support.
In his first comment since the attack, the Prime Minister said: “I really appreciate this, she is absolutely right, it’s an attack on all of us, democracy and the values we represent.”
Liberal Democratic leader Sir Ed David said: “After arson attacking his home, I can provide support to the Prime Minister and his family.
“Can I thank him for his appreciation to our excellent police and firefighters.”
Emergency services broke out in the Prime Minister’s private residence in Kent town in north London earlier Monday.
On Sunday, the crew was summoned to a small fire at the front door of the house and transformed into nearby Islington – Sir Keir is known to live in the 1990s.
Police are also studying the car fire that occurred on the same street as Kent town property on Thursday. It is understood that the car once belonged to Sir Kyle.
It is understood that the Prime Minister still owns a house in Kent City but lives in Downing Street. He lived there before the 2024 election and has been rented out since then.
Counter-terrorism police are leading the investigation and regarding the fire as suspicious.
Dominic Murphy, head of the Metropolitan Police Counter-Terrorism Command, acknowledged that the investigation could attract the attention of members of Congress.
He encouraged any of them to worry about their safety in order to act with Bridger, which is to protect the professional department of Congress.
