Mini actually is a model, the original was made by a company called Austin.
That was after Austin merged with Morris in 1952 to form BMC. The mini came in both badges.
Before that, Austin had a very successful partnership with Healey producing a line of Austin-Healey sports cars.
Unfortunately, these three along with MG, Rover and Wolseley were merged into the MG-Rover groups, which thanks to being traded through a number of greed-driven money munchers who didn't invest enough in them finally went into receivership in May 2005. A huge chunk of the British car industry, not to mention the last of the mass producers, vanished.
First BMW bought out the group, and despite injecting a few billions, all they came up with was the Rover 75 and a new Range Rover model but failed to stop the decline. Desperate to escape the liabilities, BMW sold MG Rover to Phoenix for just £10. BMW kept the Riley, Triumph and Mini for themselves and sold Land Rover to Ford.
Phoenix managed the MG-Rover group for 5 years but did next to nothing to help save it. Pheonix even kept a $500m loan from BMW for themselves and simply let the MG-Rover group die out.
All we have left really are a few small makers building a few hundred of one model per year, like AC (the Cobra, ooh baby! I wants one!), Caterham, Westfield and Morgan.
The others are owned by foreign companies;
Jaguar - Owned by Ford (Europe - PAG).
Aston Martin - Owned by Ford (Europe - PAG)
Rolls Royce - Owned by BMW
Bentley - Owned by Volkswagen
Lotus - Owned by Proton
TVR - Owned by Russian tycoon Nikolai Smolenski.
McLaren - Aha, now then. While lots of folk say they're owned by Mercedes now, that's not true. They are only sporting partners and DaimlerChrysler only own 40% shares. McLaren Group is still technically British owned (although a lot of it's funding for the recent road cars comes from Mercedes).