I followed all the advice given by Nathan ( mbam_mtbr), and though I cant say with certainty exactly which step worked, I now notice that there are no ads. I believe it was after installing Ad-block plus, which i had some difficulty in doing, that the ads terminated, as disabling javascript appeared to have no effect whatsoever. I also followed the advice I saw on another forum of opting out of ads which some European agency for data protection allows users to do, opting out of ads from some 100 + providers, which also apparently had zero effect on the pop up ads. In any case my problem appears to be solved, though i will keep an eye out should these extremely annoying ads resurface and report here accordingly. Thanks for the advice. Postscript: Actually in going to my phone just now to check which version of adblock plus i had installed i opened the app and saw the following message " you need Samsung Internet, Before you can use Adblock Plus, you must install Samsung internet 4.0 or above." with an "install now" button, so perhaps adblock plus was not in fact the decisive factor. I had searched for adblock plus but could not find it in the Play Store (i'm in Spain) nor could i install it manually from the web, so i opted for adblock for Samsung as being the closest related app , even though my device is a Huawei P20 Pro . I was able to install the adblock Browser however. The other thing I did was instruct my kids to remove at least 50% of the more than 100 apps they had installed. It occurs to me that what i have written may not be at all helpful to other with this annoying problem, given that i can't say which of the myriad things I have listed above was instrumental in removing the ads, so apologies, but this is the best i can do just now
Kind regards,
Dwight