extract below from the .gov site, under private individual it does state that HMRC will make the NOVA notification on behalf of the private importer after the individual makes an import declaration, are you dealing with it as a private importer ??
If you’re a VAT-registered company
You must tell HMRC about the imported vehicle by using the
Notification of Vehicle Arrivals (NOVA) service within 14 days. You can use a spreadsheet if you need to
use NOVA for lots of vehicles.
You may be able to
delay making an import declaration if you import a vehicle from Ireland. This is called a delayed declaration.
If you’re unable to use the NOVA online service, ask the
Imports and exports helpline for a VAT NOVA1 form.
For help completing a NOVA application, contact the
HMRC Personal Transport Unit.
If you’re a non-VAT registered company or private individual
HMRC will make a NOVA application for you, but you will need to make an import declaration and send it to HMRC by email.
You can also get an agent such as a freight forwarder to make an import declaration for you. They may make the NOVA application for you as well.
Your vehicle needs to be added to the NOVA system before you can register it with the Driver and Vehicle Licensing Agency (DVLA). Email the following to the HMRC CARS team so that HMRC can make your NOVA application:
- the C88/E2 customs documents for your vehicle (except if you brought your vehicle into the UK through the Channel Tunnel or by ferry)
- the invoice or bill of sale for your vehicle, or a current valuation from a third-party such as a garage or dealership in the UK (it cannot be an online valuation)
- any official document which confirms the VIN or chassis number of your vehicle (for example, a registration or title document, or an export certificate)
HMRC CARS team
ecsm.nchcars@hmrc.gov.uk