The UK Car Brands Losing Market Share in May 2026

June 10, 2026

Some brands gave up share in May, but this is not a doom list. It is a month-on-month registration-share view, and one month can move around quickly.

Based on AutoRank registration-date records for April and May 2026. Makes are included when April plus May registrations were at least 1,000.

-0.80 pp Ford share change

-0.57 pp Mercedes-Benz

-0.51 pp Citroen

Biggest share drops

Percentage-point change versus April.

-0.80pp Ford

-0.57pp Mercedes

-0.51pp Citroen

-0.44pp BYD

Ford moved from 7.77% in April to 6.97% in May.

6.97% share

Ford had the biggest drop in this May view, moving from 7.77% share in April to 6.97% in May.

Mercedes-Benz moved from 5.05% to 4.48%. Citroen moved from 2.14% to 1.63%.

Those are share changes, not a judgement on the cars.

Registration timing, fleet deliveries and model availability can all move a brand up or down in a single month.

BYD and Omoda were also lower in May, while Jaecoo and MG moved the other way.

That is why the most useful view is the table, not a dramatic headline.

April share, May share and percentage-point change.

Ford, 7.77% to 6.97% -0.80pp

Mercedes-Benz, 5.05% to 4.48% -0.57pp

Citroen, 2.14% to 1.63% -0.51pp

BYD, 2.77% to 2.33% -0.44pp

Kia, 4.93% to 4.53% -0.40pp

Omoda, 1.80% to 1.46% -0.34pp

Fiat, 0.78% to 0.50% -0.28pp

Volvo, 3.04% to 2.77% -0.27pp