This weathervane sits on top of the Lloyds Registery building in Fenchurch Street. Its history dates from the meetings in the same coffee house (Edward Lloyd's) that in 1760 gave rise to Lloyds Insurance. It's odd to think that every vessel in the world (over 100 tonnes) is in their books. It's all about safety.
The detail on the weathervane is incredible, especially as you can hardly see it from street level, it's even got golden rigging.
This building dates from 1901, and is worth a closer look, if only for the friezes above the doors. Here is an engraving of the site in 1816.
See where: London Daily Photo Map.