THE ROYAL wedding will be one of the biggest events of the 21st century, when Prince Harry marries Meghan Markle at Windsor Castle.

The event will be watched by millions around the world, and as such, security in Windsor will be tight, to deal with the expected 100,000 crowd.

Police have announced a number of security measures that will be in place in the town on the day of the wedding.

These include automatic number place recognition technology, closed circuit television, and hostile vehicle mitigation barriers, along with numerous measures that cannot be seen by the public.

If you're planning to visit Windsor on the day of the Royal Wedding, it is likely that you'll see British Transport Police officers on your train, as officers will be patrolling stations and carriages.

In Windsor itself, roads police will stop and check cars as they enter, and there will also be screening and a search regime in the town.

Police state that this is for the safety of the public, and that visitors shouldn't be alarmed by any of the extra security put into place.

Thames Valley Police Assistant Chief Constable David Hardcastle, strategic commander for the wedding, said: "We are proud to police the Royal Borough of Windsor and Maidenhead.

"The Force has a long history of policing Royal events from the annual Windsor Garter Ceremony to state visits and more recently Her Majesty the Queen's 90th birthday.

"The wedding of Prince Harry and Ms. Markle is no exception.

"We are working with our partners, local businesses and the community to deliver a safe, secure and happy event for everyone."