You must inform DVLA if you change the vehicle classification. It is the law for UK registered vehicles.
UPDATE V5C REGISTRATION: This section clarifies situations when you must update your V5C registration certificate (log book).
You may need to provide written evidence for certain alterations made to a vehicle.
You can also find out how to update a V5C registration certificate and where to send V5C forms.
All details on your vehicle registration certificate must be correct and current. That means you should update V5C and inform DVLA about:
Note: You cannot update V5C document to change vehicle tax class. Use this same process even when you change to an exempt tax class, such as 'disabled'.
You must update V5C Vehicle Registration Certificate (log book) if you alter any of these details:
Following certain modifications, DVLA may inform you that they want to inspect your automobile. You must also update the V5C registration certificate after making any of these alterations:
Note: In some cases the DVLA will need proof of Vehicle Type Approval for registration. They will not register such vehicles without proof of approval unless it is exempt.
DVLA need evidence or written confirmation after making certain changes or alterations. The V5C update is usually rejected if this evidence is missing.
If you change a vehicle engine number or cylinder capacity you must provide one of the following:
Changing the fuel type that a vehicle uses means you need to provide evidence any time:
Changing the weight of a large van or truck requires you to provide either:
If you convert a van to a camper van (or motor caravan) you need to provide several pieces of evidence.
Identify any changes made by marking section 7 of the V5C. Sign the form and then mail it to the Driver and Vehicle Licensing Agency. Remember to include any necessary evidence or written confirmation.
Use section 4 if the specific change you made is not listed in section 7. You need to add a letter that explains the specific changes you made. Send the completed V5C to DVLA with all the relevant documents.
Driver Vehicle and Licensing Agency, Swansea, SA99 1BA
This section is for those who are not sure where to send V5C. Use the V5C update address DVLA, SA99 1DZ after any of the following changes:
All details on your vehicle registration log book (V5C) must be up to date and correct. DVLA will contact you to confirm the changes and inform you if extra vehicle tax needs paying.
Note: They may also contact you to inspect certain changes that you made to your car or motorbike.
You must inform DVLA to update your name and address. It is the law for UK registered vehicles and you could get fined for not doing so.
When to Change Vehicle Details on V5C: Update V5C Vehicle Registration Certificate