Following on from my previous posts here, I was just pricing up a mid week ticket LHR-TLV-LHR assuming choosing a "flexible fare" would allow free cancelation, but no, even when choosing "flexible" rather than "semi flexible" there is a £100 cancelation fee, which is exactly the same as the cancelation fee for "semi".
If I book a ticket online and choose flexible I expect it to have more flexibility than a semi one but the fare rules are once again identical so I simply don't get it.
I think LY's whole fare structure is a total rip off.