Generally insurers want to know the date of conviction, your reading in breath, the length of the ban and the code on your licence: eg DR10.
"Prevention taken since" is a strange term. This could be you taking a Drink Drive Rehabilitation course, as this has been shown to reduce repeat offending, or you could explain that, for example, your partner now always collects you from an evening out..... Or you have stopped drinking altogether. (This does happen for some people after the shock of being caught.
The advice for disclosure to insurance companies is: "never Lie", as this gives grounds for claims being refused subsequently. If you were involved in an accident, then disclosure of this would be normal for 5 years anyway, without the drink driving, so they will want to know if there was injury and if you were at fault.
insurance companies will often be more understanding when it comes to drink driving on company cover, as they want the business and take the view that it is only increased risk for one part of it, whereas for individual cover there it an increase in risk for the whole policy.
