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Royal wedding spectators

Eyes forward: Thousands packed out the Long Walk outside Windsor Castle before the ceremony. (Getty)

A right Royal party! Thousands line Windsor streets for Harry and Meghan's wedding

More than 100,000 well-wishers are estimated to have lined the royal wedding procession route as police effectively formed a ring of steel around Windsor Castle in the high-security operation.

Police marksmen and airport-style scanners helped secure Prince Harry and Meghan Markle’s wedding on Saturday, with the costs expected to run into the millions.

The Royal Borough of Windsor and Maidenhead estimated “just over” 100,000 fans watched the procession along the route and British Transport Police (BTP) reported that 20,000 passengers had streamed through the town’s stations by 9.40am.

Officers with sniper rifles were spotted on roofs around the town in what was one of the largest public events handled by Thames Valley Police (TVP).

There were also street parties around the UK, as well as ‘wedding watching’ events in Kent and even outside Kensington Palace.