Aye codelook have no precise data for cabinet locations. It's just an estimate based on the postcodes the cab serves. I believe some cabinets have a postcode and show up on the BTw checker when you enter the postcode. I don't know if codelook uses this info though.
My cabinet is pretty accurate, within 20m of the estimate. The next cabinet up is way off though. Correct street, but about 500m away at the opposite end of the street.