The IPCC collects information on ethnicity based on the '16+1' or census 2001 categories. These can be collapsed into 5+1 categories when dealing with small numbers.
White
British
Irish
Other White
Mixed
White and Black Caribbean
White and Black African
White and Asian
Other Mixed
Asian
or Asian British
Indian
Pakistani
Bangladeshi
Other Asian
Black
or Black British
Caribbean
African
Other Black
Chinese or other ethnic group
Chinese
Other ethnic group
The +1 refers to information refused.