More than once I have seen someone deny that he was the driver in an accident ('my mate was driving and he legged it') to be confronted with the fact that the airbag has his DNA on it. Being smacked hard in the face with the bag produces ample traces of saliva snot and assorted tissue.
Updated (thanks to Roll on Friday.com)
On 21 February 2012, the Court of Appeal quashed Bridgeman's sentence. The former lawyer will be relased after serving just one month, to allow him to return home and care for his seriously ill wife. His 12 month sentence has been suspended for two years.