Snipers are on rooftops today with soldiers and armed police patrolling the streets below as a $58.8 million ring of steel today surrounds Windsor Castle ahead of the royal wedding.
Police, the Army and undercover members of the security services are ready 'do whatever is necessary' to prevent any attack on Harry and Meghan's big day, including shooting to kill, the Daily Mail reports.
READ MORE: Royal wedding: Concern over security cost estimate of $58m for taxpayers
The 2.6-mile route the couple will travel from St George's Chapel to Windsor Castle is lined with sharpshooters on top of buildings and other vantage points. Specialist teams are also patrolling the Thames.
Police and soldiers carrying automatic weapons will also line the streets ready to fire if necessary and are already patrolling the roads, which have crash barriers used to stop vehicle-based terror attacks.