When we think of stereotypical British English spoken by the nobility and/or royalty and other sorts of aristocracy we mean U-RP. It is considered old-fashioned and obsolete and realistically used either by old people in some isolated communities or for humorous purposes. Somewhere using U-RP may
even be seen as arrogant and rude.
There are many nuances in pronouncing vowels in U-RP and you may read more about it
here. But in terms of consonants it has some features illustrated in the videos below.
The first sketch is about a headmaster (a head of a school in the UK) which tries to sound posh and highbrow not only in the way he organises his speech but the sounds themselves. Most notably he says 'Whatsoever' pronouncing the [H] and this is typical of U-posh and some accents of the American South, but next time he overdoes it and adds the sound where it is not supposed to be (Wednesday).
Historically words spelled with WH- were pronounced like that, but in the process called 'whine-wine merge' they became homophones. The second video is a compilation of the WH- moments from Family Guy highlighting the humorous effect of using outdated pronunciation.
Also worth mentioning the tapped R in the U-RP which is associated with BBC announcers (
example) used in the first sketch.