Getty More than triple the number of black people are arrested compared to whites
Figures from the report will also reveal that, for every 1,000 black people living in Dorset, 127 were arrested last year.
The equivalent figure in Essex was just 18. And while the national arrest average was 44 per 1,000 for black it was just 15 per 1,000 for whites.
The 2011 census found that 0.32 per cent of people in Dorset and 1.34 per cent in Essex were black.
The English average was 3.48 per cent, highlighting the huge disparity the PM is looking to tackle with the long-awaited audit.