I am sorry I may put a dampener on this conversation I was done for DD before Christmas and the police rang my work prior to my court date and I was sacked as a teacher at a special needs school. However I have researched this at length and there is a document online about notifiable occupations, being a teacher is one of them however you have to be considered an immediate threat. There are four statements the police have to say yes to and evidence. In my case two of the statements were a definite no and could not be evidenced. I have involved my local MP to help me get answers.
The only thing I as a teacher would think this would affect is your commute too and from work. It is a road traffic offence not a criminal offence. Violence or crimes involving children would be different.
An enhanced CRB shows everything I was cautioned as a minor and even that was on there and I am 40, your past is always there. Even now I have had to explain what happened when I go for jobs.
I think it is with the discretion of the school, how long you have been there etc.