Grand Tour mystery as giant busts of Jeremy Clarkson, James May and Richard Hammond appear in central London

THE GIANT busts of the presenters of The Grand Tour have mysteriously appeared travelling along roads in central London.

Fans have been posting pictures of the stone heads of Jeremy Clarkson, James May and Richard Hammond at various stages - including the M4 on social media.

Warren Ralls posted pictures on Twitter of the a number of lorries carrying the busts past the Houses of Parliament this morning.

While Kunal Popat posted a picture of Clarkson's statue saying it was "ominously crawling along the M4. Be afraid London."

The eight-foot artworks are part of an Amazon stunt to promote the trio's Amazon Prime series, The Grand Tour.

Previously Clarkson's bust has been spotted in Washington DC, Seattle and Australia, teasing fans as to where the next episode will be.

In the sixth episode of the series, which was branded the best yet by fans, presenter Richard Hammond appeared to be "killed off" in an impressive stunt.

Hammond shared plans to build his own “bug out” car – an armoured vehicle designed to withstand a nuclear war.

Hammond took his converted camper van out into the countryside to test it out, and Clarkson and May were right behind him.

They hatched a plan to really test the armoured car by taking pot shots at is using rifles and even a machine gun.

After a sequence of explosions, Clarkson and May joked that Hammond was taken out along with the vehicle by bringing his "remains" to the studio in a dust pan and then spilling his "ashes" on the floor.

Viewers were thrilled by the action-packed episode and they flocked to Twitter to heap praise on the team.

Many branded it the best episode yet.

One wrote: "[It] is the best thing I've seen all year..." another added: "Grand Tour just blows Top Gear completely out the water."

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