The database is pretty much up to date, MfH. Every plate is checked every month. The only thing it doesn't reflect is transfers on death as our bots can't read owner information and there are too few transfers to justify manual verification on a regular basis. Might be a project for the next recession but, in the meantime, given plate owners are correct as at the date on which they became non-transferrable (except on death) save the odd exception whereby transfers on death came to light through non routine activity.