Unlike most other European countries, Britain had no noble-destroying revolutions in history, so its noble class appears to be present. But Is there some limits based on noble/not noble in modern Britain? Parliament consists of 2 houses - that is known, but are there any other limits?
Question based on some British films - there are, nearly always, close ties inside high establishment. It looks like, that high establishment is a closed class of rich nobles. But is it true?
In fact, question is about - how noble/not noble dividing(if it is really present) affect Britain's social and power structures?
You may answer in a broad way - for example, "some limits here, for example: ..., some limits there,... And a big limit here(again, for example)", to provide a general understanding of how system is working.