For 2008 model 84.4% pass rate from 64 tests between October 2010 and September 2011.

Seems a very low sample, but interesting to see where the failures are:

7.8% fail on Tyres
7.8% fail on Condition
1.6% fail on Size / type

3.1% fail on Brakes
1.6% fail on Hoses
1.6% fail on Brake pads

1.6% fail on Lighting and signalling
1.6% fail on Headlamp aim

1.6% fail on Fuel and exhaust
1.6% fail on Catalyst

1.6% fail on Driver's view of the road
1.6% fail on Wipers

1.6% fail on Registration plates and VIN
1.6% fail on Registration plate