Around 600 cadets are taking part in the Sovereign's Day Parade at the Royal Military Academy at Sandhurst.
Of those, 200 of the senior term will be receiving their commissions after a year of hard training.
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Samson the miniature steam train has re-entered service, on the Romney Hythe and Dymchurch railway, Kent's mainline in miniature.
Kenyans Eliud Kipchoge and Vivian Cheruiyot won the men's and women's races respectively, in a scorching hot London Marathon.
The ABP Southampton Marathon is the city's biggest running event, attracting 10,000 runners - and walkers - and thousands of spectators.