I have never understood why any wives/families use the EK clinic when they can directly access anywhere they like without a referral, also most of it isn't even pay and claim, just give them the EK medical card and most of the big names will direct bill. There is no such thing as 'opting out' for pilots' families (other than dental) They can see a doctor (GP) on a while you wait basis, without an appointment at the likes of London Hospital and others. Dental does require an opt out and is pay and claim, but again - much easier, faster and probably closer than the EK clinic.
If only us pilots could avoid the place too! It gets raised at all the washup sessions too - still no improvement. Sometimes it's as if the company expansion has came as something of a surprise to some departments..