The King's Guard led a touching tribute to Sir Elton John, playing his hit 'Crocodile Rock' outside Buckingham Palace before his triumphant Glastonbury set on Sunday. 

An Instagram story reposted by both Elton and his husband David Furnish shows the infantry contingent playing a version of the 1972 hit on the trumpet. 

The footage was captured by video creator Shimmy Socol filming the King's Guard, who unexpectedly broke into a touching rendition of one of Elton's biggest hits hours before his eagerly anticipated set at Glastonbury.  

Elton's Glastonbury performance, which marked the legendary singer's final ever live show in the UK, is expected to set the record for the most-watched set at Worthy Farm of all time. 

The 'life-affirming' set was watched by his husband Furnish and their children, as well as celebrity pals including David Walliams and the Spice Girls, who were reportedly set to join him for a glitzy after party following the show. 

Stars including Paul McCartney, Taron Egerton and Andrew Garfield were also spotted backstage watching the show before attending Elton's bash. 

Speaking on Watford FC footballer Troy Deeney’s Deeney Talks podcast, John - who is a lifelong fan of the Hertfordshire football club - expressed his desire to 'throw a party' once he never has to play 'Crocodile Rock' again.

Elton said: 'The last time I have to sing 'Crocodile Rock' I will probably throw a party. But people love to hear it. It was written as a kind of joke, as a pastiche, and it became a big hit and people love to sing along with it.'  

He added: 'So who am I to say, 'I am not going to play it', because I play to amuse people and to entertain people. But I have to say when the last show is done at the end of the tour I will never ever sing that song again.'

At the start of his Glastonbury show, Elton walked on to the stage in a gold suit before taking a seat at the piano as fireworks went off, before saying he never thought he would play the festival for a 'special and emotional' show.

He later removed his famous red-tinted glasses to wipe away tears as his musical guests paid tribute to him on stage.

During the evening, he dedicated his penultimate song 'Don't Let the Sun Go Down on Me' to the late George Michael on what would have been the singer's 60th birthday, saying: 'This is a very special day today, I wondered how I was going to approach it.

'One of Britain's most fantastic singers and songwriters was George Michael. He was my friend, he was an inspiration, and today would have been his 60th birthday, so I want to dedicate this song to his memory. All the music he left us with is so gorgeous. This is for you George.'

He opened his set with Pinball Wizard before playing 'The B***h Is Back' and then said: 'I never thought I would ever play Glastonbury and here I am.

'It's a very special and emotional night for me because it might be my last show ever in England, so I had better play well, and I had better entertain you, you've been standing there so long, and I really appreciate all the outfits and everything.'