Wrapping the whole car would mean informing DVLA if it meant a colour change. However, even if a car has a black roof from the factory, the predominant colour is the one that's on the V5, so that won't change.
Do people declare PPF to their insurers?
I would - if for nothing else should the worst happen and you need a repair on a panel with PPF, they may not cover it as it's not listed on the policy.
A wrap is a temporary change and doesn't have to reported to dvla as its not a permanent colour change.
Afraid you're wrong mate - the rules regarding full vehicle wraps have been changed so you now have to let DVLA know if you've changed the colour of your car with a wrap. DVLA statement copied and pasted from around 2014...
"The register maintained by the driver and vehicle licensing agency (DVLA) essentially exists to assist in revenue collection, road safety and law enforcement. The Police and other enforcement agencies rely on the DVLA record for all vehicles-related investigations. It is therefore paramount that the information stored on the vehicle register is accurate and up to date.
DVLA records details given by vehicle manufacturers at first registration. Any changes to the vehicles details must be notified to DVLA by law.
By covering the entire vehicle in a coloured adhesive/vinyl wrap, it is DVLA’s view that the colour change should be recorded. To notify a change of colour you should complete section 7 of the registration certificate V5C and return it to DVLA Swansea SA99 1BA. You should receive a replacement certificate within two to four weeks.
We would like to advice any owner of a vehicle that has had a full colour change wrap that they should inform the DVLA by completing the correct paperwork. Partial wraps and digital printed wraps do not appear to be affected.
For any further information can by obtained from the DVLA on 0843 515 8104."