You have to send a data rectification notice to the claimant and their legal representative. You send it to the DPO and it must instruct them to
update their records with your new
address for service and to
erase your old address. The highlighted words are there for a reason and you must use them.
As for the CNBC, email caseprogression.cncb@justice.gov.uk and also CC yourself with the following:
Dear Sir/Madam,
I am the defendant in the matter of [Claimant Name] v [Your Full Name], Claim Number: [XXXXXXX].
Please update the court record with my new correspondence address as follows:
[New Address Line 1]
[New Address Line 2]
[Town/City]
[Postcode]
This change is to ensure I receive all future correspondence, including the Directions Questionnaire (Form N180), without delay.
Yours faithfully,
[Your Full Name]
[Your Previous Address] (for reference)
[Optional: Phone Number or Email]
Make sure you include the claim number in the subject field of the email. Ideally, you should set up a mail redirect service with Royal Mail for a few months, just to make sure that anything sent to your old address is forwarded to you automatically.
Don't submit your DQ until you can see in your MCOL history that an N180 has been sent to you. You don't have to wait for it to arrive before sending your DQ.