For homicide convictions over the three years ending March 2025, about 61% of convicted principal suspects were identified as White, 24% as Black, and 8% as Asian. These figures are for all homicides, not specifically knife homicides.
The latest comprehensive figures come from the 2021 Census for England and Wales (population: 59.6 million). These are the official ONS figures still used as the benchmark today.
Ethnic group% of populationApprox. number
White
81.7%
48.7 million
Asian / Asian British
9.3%
5.5 million
Black / Black British
4.0%
2.4 million
Mixed / Multiple ethnic groups
2.9%
1.7 million
Other ethnic groups
2.1%
1.3 million
Total
100%
59.6 million
A more detailed breakdown of some major groups:
Ethnic group%
White British
74.4%
Other White
6.2%
Indian
3.1%
Pakistani
2.7%
Black African
2.5%
Bangladeshi
1.1%
Black Caribbean
1.0%
Chinese
0.7%
Arab
0.6%
A few points relevant to your earlier questions:
White British (English, Welsh, Scottish, Northern Irish or British) was 74.4% of the population in 2021.
All White groups combined (including Irish, Polish, Romanian, Italian, etc.) were 81.7%.
Asian was 9.3%. Within that, Indian was 3.1% and Pakistani was 2.7%.
Regarding Sikhs specifically: the census records religion separately from ethnicity. Sikhs are mostly found within the Indian ethnic category, but not all Indians are Sikh and not all Sikhs are Indian. The 2021 census recorded about 524,000 Sikhs in England and Wales (roughly 0.9% of the population), a figure that is considerably lower than the 2% assumption you mentioned earlier.
One caution when discussing crime statistics: ethnicity, nationality, immigration status, and religion are separate variables. The available homicide data generally reports ethnicity of offenders (when known), but not religion, so it is not possible to reliably estimate the number of Sikh offenders from the published homicide tables.