Best to check if they have plans for replanting anyway
AFAIK, there are plans to fell non native trees (in country after arbitrary date of 1600, although not consistent as they don't seem to dislike Horse Chestnuts?) if they are located somewhere that in 1600 or before was wooded.
This means large areas of trees and includes big chunks of Gwydir Forest as well as Rhiwbach as already discussed. Again AFAIK... there are no plans to replant and the assumption is that it will naturally reseed with the kind of trees there were at 1600 such as Oak, Rowan, Elm, Ash, etc depending on the soil. This ignores the fact that the climate now and in future may not be the same as 1600 or the presence of diseases like Elm disease, Ash fungus nor changes like grey squirrels and many other significant differences.
I'm all for opening up clearings in monoculture forests and/or clearing scattered areas to plant deciduous, but the policy is fell large areas and hope for a 1600s ancient woodland to appear, possibly with Robin Hood skipping past wearing green tights
It seems a small number of people from the Woodland Trust (previously an organisation that did good for trees) decided this was THE way and despite them not being a statutory body seemingly set this as policy in Wales as well as England.
As an aside, the tallest known (measured by surveyor tape not estimated or guessed) tree in the UK is in the Gwydir but it's height and exact location is kept secret from NRW in case they prioritise felling of those stands. You couldn't make this stuff up!
It may be a few years before there's enough cover to obscure explorers in felled areas
/End obnoxious rant