This link on my bill and provided jb other threads on this forum does not work (as of 10/10/19) https://www.idmobile.co.uk/help-and-advice/international-and-roaming-charges
I have searched the website and can't find the charges listed anywhere. I've tried in both mobile and desktop versions in Chrome for Android.
Best answer by Gregor
I have checked the link that you provided and it worked for me. I will post screenshots below with all the prices listed.