How common is yod-coalescence in modern RP?

I am an non native English speaker in where the some pronunciations taught have been obsolete in British English . Recently, I've got some time to do my research and discovered something called yod-coalescence.

Yod-coalescence sometimes occurs with clusters, like /dj/ and /tj/ which coalesce into /dʒ/ and /tʃ/ respectively.

For example, during would be pronounced as /dʒʊərɪŋ/ instead of /djʊərɪŋ/, and Tuesday would be pronounced as /tʃuːzdeɪ/ instead of /tjuːzdeɪ/.

How common is it in modern RP?

Solution 1:

It is increasingly common.

As some commenters pointed out, it is not necessarily easy to find out what constitutes "modern RP", or whether such a thing exists, but as concerns the standard varietie(s) based on southern English speech used as a model for learners, yod coalescence at the beginning of stressed syllables traditionally pronounced with /tj, dj/ is now accepted as part of the standard, if not more common.

John Wells marked pronunciations with coalescence as "non-RP" in the 2000 edition of the Longman Pronunciation Dictionary, but he dropped it for the 2008 edition (here's a video of him explaining it).

The 2011 edition of the Cambridge English Pronouncing Dictionary went so far as to give priority to pronunciation with /tʃ, dʒ/ over /tj, dj/, saying "it now seems /tʃuːn/ and /dʒuːn/ are more widely used and these pronunciations are given priority for most such words, with the /tj/ and /dj/ pronunciations as second choice" (pp. xviii–xix).