I sold a car in 2017 but the DVLA say I am still the owner, what can I do?

Car was sold 2017. No documentation / proof of sale now available. DVLA say still registered to me and now faced with £1000 plus of penalty fines over 2 weeks! (bus lane, emissions, speeding). Can police...

Can a car have two owners?

Can two persons own a car, such as husband and wife, in the same way they can for a house?