One of the distinctive features about the British class system is that aristocratic titles can still be inherited.

英国阶级制度一大特点是：贵族头衔仍然可以继承。

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During the 19th and 20th centuries, Robertson and Nicol show, “the common law was re-fashioned to serve the British class system from the perspective of … the Victorian club.”

在19世纪和20世纪，罗伯逊和尼科尔的著作写到，“习惯法老调重弹，从...维多利亚(上流男士)俱乐部的立场出发，服务于英国的阶级制度。”

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Interestingly, even as Thatcher was working to open things up and making the British class system more like America's, the US class system started becoming more and more rigid.

BBC: Class calculator: A US view of the class system

Sometimes they carry this to ridiculous lengths: I remember being addressed on the subject of the rigidity of the British class system by very rich men over lunch in a grandiose club in one of America's greatest cities.

WSJ: Theodore Dalrymple on the Secret Appeal of Downton Abbey

Casually, the movie chronicles the end of the rigid British class system and the liberation of the working class through popular entertainment.

NEWYORKER: Gosford Park