A Navy war-ship will dock on the Thames in Central London later.
HMS Richmond will stop at West India Dock for five days as part of an 'Armed Forces Day' celebration.
This Saturday it will be open to the public, offering a unique opportunity for Londoners to go aboard and learn more about the careers and opportunities available in the Royal Navy.
More top news
Arsenal midfielder Mesut Ozil made a young fan's day by throwing him his shirt after the drubbing of rivals Chelsea.
Expect some sunny spells and scattered showers after rain clears east.
The British Open Water Swimming Championships have kicked off at the Serpentine in Hyde Park.