My wife and I (UK pensioners) filled in the S1 form from NHS 3 years ago and had ourselves put on the Bulgarian system,our GP does not charge us for visits to her and we have a pink book that we use each month at the Aptik for our medicines.My wifes inhaler is free,75 lv to buy over the counter, and our other meds are at a discounted price.A couple of years ago I was diagnosed with cancer and the Bulgarian Oncologist advised me that I should return to UK for treatment,this I did and at no point was I asked in the UK to pay for anything.This despite the fact that I was upfront when registering (temporarily) with a new UK GP having let my old GP registration lapse,and the hospital having to translate all my medical notes from Bulgarian into English.