Performance by cohort
2 year bands · 2,350 tests
Pass rate is broadly flat across the cohorts — new and old Bailey examples track each other at the test bay.
Pass
91.6%
Fail
4.9%
PRS
3.1%
Avg mileage at test
18,852 mi
Pass
91.6%
Fail
4.2%
PRS
4.2%
Avg mileage at test
12,383 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.