Following the US, the UK also approves the use of Storm Shadow missiles in Ukraine's attack on Russian soil

Ukraine has launched its first attack on mainland Russia using Storm Shadow air-to-surface cruise missiles, backed by Britain.
On the 20th (local time), Bloomberg News quoted a Western official as saying, "
The British government has approved the use of Storm Shadow in response to North Korea's military deployment to Russia." The Telegraph, citing a Russian military broker, said, "On this day, North Korea
"Fragments of the Storm Shadow missile were found in a village in the Kursk region of Russia, where North Korean troops have been deployed," the report said. The United States recently sent 300-kilometer-range ATACMS tactical missiles to Ukraine.
With restrictions on the use of the missiles lifted, it appears that the UK has also given its approval for Storm Shadow to be used to attack mainland Russia.
British Prime Minister Keir Starmer, who attended the G20 summit, said on the 18th, "Support for Ukraine
"We must strengthen our defenses," he said, "and we must not allow Russian President Vladimir Putin to win."
"During the summit, in an unofficial meeting between Western officials,
Discussions have taken place regarding the use of Tome Shadow," a source told the Financial Times.
The source said, "This is a clear message to the North Korean military (who are being sent to support the Russian military)."
"The decision to send the Storm Shadow was evaluated as being very reasonable," the report said. Meanwhile, the British Prime Minister's Office, the Ministry of Defence and the Foreign Office all cited "operational reasons" and avoided commenting on the use of Storm Shadow.
The BBC reported that "the British Cabinet is concerned about a strong backlash from Russia and is taking a cautious stance so as not to be perceived as Britain taking the lead in using Storm Shadow."
This is what I interpreted.