The Are Lingus jet suddenly appeared into view while the crowds were filmed from above by the National Police Air Service.
And the dramatic sight of the huge plane thundering past below them came as something of a shock to the NPAS crew on the helicopter.
… That awkward moment where you’re innocently scanning crowd numbers around the Royal wedding and a plane several thousand feet BELOW us scares me for a split second! @ThamesVP @AerLingus #p6572 pic.twitter.com/5T37J6ANtk
— NPAS Benson (@NPASBenson) May 19, 2018
They tweeted: ‘That awkward moment where you’re innocently scanning crowd numbers around the Royal wedding and a plane several thousand feet BELOW us scares me for a split second!’
Tweeters also reacted with shock at the plane photobombing the Royal Wedding crowds:
I’m sure that wasn’t it’s route and it purposely flew over to catch a glimpse of the wedding
— Female Jedi (@grayjedigirls) May 20, 2018
I’d have weed my pants!
— Mortified American (@ferociousfuz) May 20, 2018
Never underestimate the lengths some companies will go to just to get some free advertising… LOL
But seriously, that looked scary
— Sonia #FBSI (@SMacD49) May 20, 2018
Yup, I would have a bit of a jump from that.
— NaturalSelecter (@NaturalSelecty) May 20, 2018
The plane was flying between 1,000 and 3,000 feet as it made its descent towards Heathrow Airport, while the police chopper was flying at over 8,000 feet.
The NPAS kept a close eye on the thousands who turned up to catch a glimpse of Prince Harry and Meghan Markle as they took to the streets in a procession following the glitzy ceremony.
Some 100,000 lined the streets of the Berkshire town as the newly-married couple made their way to their wedding reception.
MOST POPULAR TODAY ON YAHOO
- Sir Elton John’s reaction to Paster Michael Curry’s Royal Wedding sermon is priceless
- Details emerge from star-studded Royal Wedding evening reception
- Prince Harry and Meghan Markle’s royal wedding: The best pictures of the day
- Royals caught giggling on camera during pastor’s passionate speech
- Going on holiday? These are the worst UK airports for flight delays
The NPAS provides air support to the 43 territorial police forces across England and Wales.
The newly married Duke and Duchess of Sussex will have little time to recover from their fairytale wedding as they head straight back to work this week.
Unlike other newlyweds, Harry and Meghan will not be jetting off on a honeymoon straight away, and will instead be back on royal duty, carrying out their first official engagements as husband and wife.
The couple, who exchanged vows in a ceremony watched by millions across the world on Saturday, are due to attend a Buckingham Palace garden party on Tuesday as part of the Prince of Wales’s 70th birthday celebrations.