Sierra Leone's civil war has been the primary reason for the growth of its communities in Britain.
But, in common with other west African nations, the pattern of settlement is a familiar one based upon people heading for where their communities already exist.
Overall, the number of people born in Sierra Leone living in Britain rose by about 10,500 between 1991 and 2001. The vast majority are in London where the largest clusters are in Southwark and Lambeth.
Modest numbers appearing in the North West are almost certainly the result of asylum dispersal.