If you're going to race horses against motorbikes, you might want to practice - especially if it involves jumping through fire.
Members of the Armed Forces have been practising their routines for this year's military show.
The Royal Navy has been practising its security formation for the Royal Guard, which will accompany the Queen down the Thames on Sunday.
HMS Wildfire is opening its doors today in the hope of securing new recruits. An open day is being held at Rickmansworth and Watford Sea Cadets' base in Watford to give people the opportunity to see what life is like in the Navy.
There'll be demonstrations on weapons handling, firefighting and chemical defence. More than 2,300 men and woman currently serve as Royal Navy reservists along with their normal day job.
The crew of HMS President are calling on more people to become Royal Navy reservists.
Today marked the beginning of a recruitment drive at St Katherine's Dock. Two hundred and fifty personnel are already on the books - but fifty per cent more are needed by 2018.
To mark the Diamond Jubilee celebrations of 2012, this year’s British Military Tournament will cover the "life and times" of Queen Elizabeth II, starting with the events of 1926 (the year the Queen was born) and finishing with the current-day military engagement in Afghanistan.
The event is described as the largest display of military theatre anywhere in the world and will include:
- More than 600 participants (including active servicemen) and 150 horses.
- The bands of the Royal Marines, the Household Cavalry, the Royal Artillery and the Royal Air Force.
- The horses of the Household Cavalry competing with the motorcycles of the Royal Signals’ White Helmets over an obstacle course which includes jumps and flaming hoops.
- A battle re-enactment featuring the Royal Logistic Corps in a dramatic bomb disposal in Afghanistan.
- The largest massed bagpipe band seen at Earls Court since the Second World War.
While the rest of the capital was sleeping, hundreds of soldiers rode on horseback through the streets of London to rehearse the State Procession for the Queen's Diamond Jubilee.
Members of The Household Cavalry Mounted Regiment rode at dawn from the Palace of Westminster along Whitehall to Trafalgar Square, then through Admiralty Arch and along the Mall to Buckingham Palace.
The route was lined with personnel from the Royal Navy and Royal Marines, Foot Guards and Massed Bands of the Household Division, the Princess of Wales's Royal Regiment and the Queen's Colour Squadron of the Royal Air Force. In total, some 2,000 servicemen and women took part in the rehearsal.
Thousands of flag-waving well-wishers are expected to turn out for Tuesday's spectacle.
It looks rather different from the boat that will carry the Queen down the Thames in this weekend's Diamond Jubilee celebrations, but today HMS Hurworth is acting the part of the Royal Barge.
The Royal Navy is practicing its formation for the Royal Guard, which will accompany the Queen's boat down the river on Sunday.
Ten naval vessels will surround the Royal Barge, while almost a thousand other boats will take part in the procession.
"To win in war and succeed in peace."
The crew of HMS Ocean will be hoping to fulfill the second half of the ship's motto, as they help defend the London Olympics.