On giffgaff's pricing page, it states the following:
We also believe that a free number should be just that, so all 0800, 0808 & 0500 numbers really are free.
This statement is intended to give the impression to the reader that giffgaff's policy concerning calls to these numbers is different from its competitors. The truth is that all UK mobile networks have been obliged since 1st July 2015 to make these numbers free to call. Schedule 1 Paragraph 10 of the Consumer Protection from Unfair Trading Regulations 2008 describes "Presenting rights given to consumers in law as a distinctive feature of the trader’s offer" as an unfair commercial practice. Therefore giffgaff should remove this misleading statement from its pricing page.