PC Mick Wass, his rider during his time at the Met, said, "Chiswick has always liked to think he is the one in charge, but he has always looked after me."
Jeanette Allen, Chief Executive of The Horse Trust, said: "Chiswick is a real hero and it is a privilege to be able to provide him with a dignified retirement after spending a lifetime bravely serving the people of London."
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Pregnant woman who was labour has had her "phone snatched while calling for and ambulance to hospital".
It will be increasingly cloudy this evening, with sporadic outbreaks of rain or drizzle spreading in during the first half of the night.
A derelict north London garage has gone on sale for £360,000 - more than the cost of a flat on the same road.