I found this:

http://1939register.info/


Dates shown are usually not the date of the event, but seem to be the date of the update (or possibly the date on the form that triggered the update)

· CR283 is a form that is used when there is a Change of Surname, Forename, or Date of Birth (most changes will be surname changes, of course)

It's missing the Q though could it be a 2?