The Telegraph should be ashamed of its self, I think in the first article mentioned is a scare story which is an example of a "false light". False light is where you tell the truth in such a way that it gives a very misleading impression to the reader or viewer.
It states that radiowaves are a IARC Class 2B carcinogen, when you know the meaning of class 2B carcinogen it is not so scary it means
"Possibly carcinogenic to humans",
The IARC have four classifications they are
Class 1, "Carcinogenic to humans"
Class 2A, "Probably carcinogenic to humans"
Class 2B, "Possibly carcinogenic to humans"
Class 3, "Not classifiable as to its carcinogenicity to humans"
Class 4, "Probably not carcinogenic to humans"
So class 2B is a substance with very little evidence in humans, see monographs.iarc.fr/ENG/Preamble/CurrentPreamble.pdf on page 23 where it states for Class 2B
It means that only a very weak case can be argued for the thing being carcinogenic in humans.
Also being in class 1 does not mean a chemical or other agent is a very potent carcinogen, it just means that it is possible to prove it is carcinogenic in humans. For example estrogen is a class 1 substance, it does have some carcinogenic effect and it makes breast cancer grow faster in many cases. But estrogen is needed for women to stay healthy (estrogen helps a woman's bones) and it has an anticancer effect for some cancers.