Taylor Swift and her staff appear to be taking significant safety precautions.
The pop singer and her Eras Tour crew members have been placed under a security lockdown ahead of their London gigs this week.
The 34-year-old singer will begin her five sold-out nights at Wembley Stadium on Thursday, just a week after postponing three gigs in Vienna due to assault threats.
The Sun adds that stringent "presidential level" security would be imposed around the singer.
Other sources say that extra counterterrorism-specialized private security will be employed at the London events alongside the Met Police.
A person familiar with the matter said: "Taylor's security and of those around her has always been paramount, but even more so now."
"She and her dancers were instructed to 'go to ground for their own protection' in light of the Vienna danger. That is why, except from the promoter's announcement, no information concerning the cancelled events has been released," they continued.