The Queen’s 90th birthday on Thursday 21 April will be marked along the Thames.
A 62 round gun salute will be fired across the Pool of London from the Tower of London at 1pm.
Her Majesty will be at Windsor Castle where she and Prince Philip are due to go into the town.
In the evening the Queen will light a beacon outside the castle. Soon after another will be llt at the Copper Horse at the end of Windsor Great Park’s Long Walk.
The 900 chain of beacons includes one on Wittenham Clumps near Dorchester which should be visible around 8.15pm not only from the River Thames below but as far away as Oxford.