U.K. new-car registrations increased 28 percent in July to 143,921, according to figures from the SMMT industry association.
The growth came as supply chain challenges eased, allowing automakers to increase production and fulfill backlogs in orders.
Battery-electric vehicles recorded an 88 percent increase to account for 16 percent of all new registrations for the month.
The SMMT said company registrations also drove the growth, as uptake by large fleets increased 62 percent to 80,961 units and business registrations rose 29 percent to 2,915. Private demand remained stable at 60,045 units.