Bannau Brycheiniog. Yes or no.?

It's just up the road so I expect it will remain as the Brecon Beacons for a long time even amongst older Welsh speakers.

We were discussing this the other day with a Welsh, Welsh-speaking friend and she was all for the name change but, like all place names in Wales, both will probably to be used.

I see no reason why the Welsh should not use the Welsh name and the English the English.

Lots of countries have different versions of a name for places
London - Londres (France) - Londra (Italian) The French call England Angleterre, the Germans talk of Grossbritannien.

It seems perfectly reasonable for the Welsh and English to use different names in different languages.

A Welsh name for a Welsh national park sounds reasonable to me.

As for Sunak, if in Australia would he refer to Ayers Rock rather than Uluru, just to be awkward?

I heard the pronunciation and it sounds very straightforward for non-Welsh speakers!

W
wheniwas your age. Or even tried to say it !

If I'm ever in that area I'll make an effort to get the pronunciation correct.

Welsh name for Welsh mountains? Why ever not? Let's go for it.

I live in mid Wales, within the national park. The publicity around the name change was a problem, nobody told local businesses so all the literature is out of date, and that is annoying people locally - typical high handed National Parks action.
Having said that, I think it’s good to revert to the Welsh name - I think it will take many years for it to be the first name people from outside Wales think of though, if they do at all.

I agree with Foxygloves that the reasons given are not sensible, but I also agree that a Welsh name for a place in Wales is a matter for the Welsh, and why shouldn't they decide to change it? Nothing to do with Rishi Sunak. I wonder if he has ever even been there... 🏴󠁧󠁢󠁷󠁬󠁳󠁿

Makes perfect sense to me, so I'm a yes!

No, no, no
The “connotations” of “beacon” seem to be entirely misrepresented. Nothing to do with carbon emissions!
I have no quarrel with using the Welsh version of the name as an option but do the environmentalists also wish to rename Beaconsfield, Minehead, Coalville.etc?
They do not see to understand the derivation of (Beacon” which comes from Old English bēacen, bēcen, bēcn “a sign, portent; a standard, banner; a signal, signal fire, signal hill or tower, watchtower; lighthouse.” )
The reason it was a fire long ago was, guess what, because they hadn’t invented LED bulbs
It gets sillier by the day!

Abosolutely Yes, I don’t understand what it’s got to do with Rishi.