Security personnel are on full alert at the British grand prix.
The increased tension is due to the terror attack in Tunisia last week, in which 30 of the 38 people gunned down were British.
It is also the tenth anniversary of the London terror bombing attacks.
So the Daily Express newspaper said sniffer dogs are on patrol at Silverstone amid increased security checks, as the country has been put on a "severe" terror alert.
And the Mirror said an armed police response unit is on standby.
"Because it is a major high-level sporting event, we are already on high alert," a circuit spokesman said.
"We have had a risk assessment by Northamptonshire police and security is based on that assessment."