{On the base of the bust:}
1806 Benito Juarez 1872
Wikipedia remarks that Benito Juárez is notable for the number of statues and monuments in his honour outside of Mexico. But we can find no reference anywhere to this one. It looks to us to be a copy of the one that Getty claim is in Ensenada, coastal city in Baja California, Mexico, but we can find no information about that one. We give up.
Site: Benito Juarez (1 memorial)
SW1, Halkin Street
This building is not the Mexican Embassy (that's in W1) but it's an off-shoot, dealing with Military, Naval and Commercial Affairs.
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