Drink driving
Jaz,
Drink driving does not get you a criminal record so to speak, however it is recordable for home office statistics and a record will be created by the police (not criminal).
With regards to jobs, it depends on aggravating or mitigating circustances, for instance the legal limit is 35microgrammes for 100ML of breath, if you were anything close to this it would not normally matter.
With regards to the aviation industry, i can't be sure, as they are proper strict, the legal limit for pilots is 20MG of alcohol for 100ML of blood, comparing this with the limit for a driver which is 88MG of alcohol for 100ML of blood.
This probably does not answer your question, but some useless info for you.