First taking the BAM brands out of the equation, how are things shaping up in the UK? From 2010 to 2016, sales were up 76%. Now individually: Lexus +124% JLR +113% (LR +113% Jag +112%) Porsche 93% Volvo +24% Alfa Romeo -45% . Infiniti has grown massively from limited sales in 2010, Tesla are estimates and Cadillac has petered out.
Summary: Lexus, Land Rover and Jaguar grew the most. I cannot say I understand Tesla's reluctance to release sales data but maybe it's concerned how it may be interpreted.
Now adding the other brands to the BAM marques, how do things stack up? Total sales growth goes to 81%, due to the BAM brands increasing 82% so nothing in the difference. Mercedes has grown the most but still trails the other two. The 'Others' took 26% in 2010 and 25% in 2016. The BAM marques took 75% of all premium sales in 2016.
Summary: The BAM trio lead again. Unlike Sweden where local marque Volvo totally dominates, JLR cannot even get close to any of the BAM brands, such is the public's fixation with anything German. The three biggest in 2016 were 1) BMW & Mini, 2) Audi 3) Mercedes.
Data source: SMMT.
Text source: RayCee.