Later today, the royal row barge 'Gloriana', will be placed in the water the first time.
It will lead the flotilla of boats during the Diamond Jubilee river pageant, ahead of the Queen's boat the 'Spirit of Chartwell'.
Specialist craftsmen have spent the last 18 weeks creating the vessel in a secret location.
More top news
Storm Imogen - when and where we will see the strongest winds? ITV Weather's Manali Lukha gives the breakdown.
Mosques including the East London Mosque in Whitechapel open their doors in 'Visit My Mosque' initiative.
The ISIS execution gang fronted by 'Jihadi John' had two British extremists who learned radical Islam together in London, ITV News reveals.