Does the word "gentleman" retain the distinction "of leisurely lifestyle" anywhere in British English?

I've been watching a great deal many British period films lately, and having done so has made me grow acutely aware to the nuance of the word gentleman. Once upon a time, a gentleman wasn't just some ordinary man off the street, as we might likely apply the word to nowadays, oh no; the gentlemen I watch typically

• "go out to the country" to one of their palatial country homes
• have an "allowance" from some vast checkbook, and spend precious little time working
• have many servants to dote upon them and many sashes about their houses to summon those servants
• typically walk about in exquisitely manicured gardens and parks
• always have a "club" to relax in, and "society" dinners to attend to

From what I can tell, a gentleman isn't necessarily of aristocracy, or nobility; the primary characteristic of them all is that one needs to keep up the appearance of not having to work, even if one does. And, what I've also noticed is that in the many films I've watched, up to the Second World War period, this distinction of gentleman is always well observed by all characters present.

So, if you'll excuse my long-winded digressions, I have a simple question: Is this usage still current anywhere in British English? Are there certain groups of people who still observe that not everyone is a gentleman, and that it requires a particular lifestyle?

In the past a gentleman might have been expected to be independently wealthy, or have pretended to be so, but he would never have been a gentleman without being of the right class. This meant education, accent, etiquette, vocabulary, parentage (anything I've missed?).

Outside of referring to these gentlemen of past times, no one in the UK now would think a gentleman has to be independently wealthy. I think most would go with Hexagon Tiling's example, polite, possibly speaking with received pronunciation and possibly smartly dressed.

However, a small group of men who went to certain public schools definitely do think of themselves as gentleman, distinct from the oiks who went to comprehensives. I know this because I'm friends with some of them. In my view the modern British workplace either burnishes their elitism (financial centers, the media) or erases it away (any where else).

You might occasionally hear someone say of someone they admire for their manners and courtesy "He's a real gent". Other than that - no.

The concept of a gentleman goes back to Chaucer and earlier. You'll have to wait for the film :-)