Detailed Country of birth, by borough from the 2011 Census.
Most detailed country of birth (274 countries), by borough.
Data taken from 2011 Census Commissioned table CT0048 (ONS).
Source: 2011 Census (27 March).
File contains two tables of the same data with boroughs arranged down the side and along the top.
Similar data to this at ward level is available in this census tool.