Yes, that's something that many people overlook - the strata within the blanket term 'middle classes'. It's interesting how broad that area has now become, in fact it's quite blurred around the edges, especially with the advent of earners like the pro footballer, for instance. Footballers were once viewed as pure working class, but given their vast fortunes today, they are elevated to middle class living by virtue of material wealth, however, they would rarely be expected to fit in socially with other highly-paid middle class members, such as the professional middle class - doctors, lawyers, etc. People still tend to cling to their tribal groups, as it were, but nowadays far less out of deference, but because of their comfort zone with like-minded others.
It's also interesting to note how 'trade' has lost its previously derogatory and inferior demarcation of a class barrier. Imagine the pre-Second World War public tuning in on their radios to listen to hours and hours of painters, decorators, roofers, and cooks nattering on about their work! Heaven forfend that one should be expected to find estate agents the least bit 'entertaining'. They would think the BBC had gone mad. Television has probably helped to break down a huge amount of such barriers, along with the Internet.
