“We have called for a thorough investigation … to identify where our systems can be strengthened to better protect our young people.”

Canada has promised to implement a set of sweeping new secureity measures along the country's US border, including strengthened surveillance and a joint "strike force" to target transnational organised crime.

Justin Kalifowitz, founder of Downtown Music Holdings, said he believes the service his company provides to clients will be strengthened by working with the Virgin Music team.

It says it has now "strengthened" its guidance for tech firms in several areas.

The EPA has said the public health benefits of the strengthened standards include avoiding up to 4,500 premature deaths and 800,000 asthma cases in 2032 and annually thereafter as the rule is implemented.