Prime Minister Sir Keir Starmer said the “appalling incident on a train near Huntingdon is deeply concerning”.
He wrote on X: “My thoughts are with all those affected, and my thanks go to the emergency services for their response.”
Home Secretary Shabana Mahmood also said her thoughts were with the victims, their friends and family, and praised the emergency workers who responded.
On Monday, the transport secretary emphasised that such incidents were “very rare”, adding that 27 crimes were committed for every one million journeys on the UK rail network.
She added that the government would “review security arrangements” across the network and respond to outcomes “in a practical way”.
Conservative leader Kemi Badenoch told the BBC she was “horrified” by the attack, saying: “I can only imagine how frightening it must have been to be in an enclosed environment with someone rampaging in that fashion.”
Shadow home secretary Chris Philp told BBC Radio 4’s Today programme on Monday that he would like to see mandatory minimum sentences for knife possession “tightened up even further” in response to the attack.
King Charles issued a statement saying he and Queen Camilla extended their “deepest sympathy” to those affected and their loved ones.
