As regards "Should I return to the original surgeon or let them operate in this country? How difficult is it to remove after 5 weeks? "
You just enunciated THE major risk of medical tourism. What do you do when you go elsewhere for an elective procedure and complications ensue?
Frankly, As regards "maxiliofacial consultant seems to have no experience with Porex" - that makes NO sense. POREX implants have been on the market for almost 20 years. All American plastic surgeons are familiar with them. I would assume that a well-trained British Maxillofacial surgeon would be AS familiar with them if not more (NO FDA like body in the UK slowing innovation to a crawl). I suspect that he/she does not want to assume someone else's mess when they were not good enough to be asked to do the procedure in the first place.
I have full confidence that British surgeons CAN and will do a good job IF they are fairly compensated for the work dealing with your implant. You need to find another one.
Furthermore, I am NOT sure that they need to be removed. Unlike other implants, POREX implants become invaded by blood vessels and scar tissue and are incorporated - that makes their removal bloody and tedious. Depending on its location and amount of exposure, it MAY be possible to burr or shave the exposed part without removing the implant.
Again - you need to find someone who will be willing to take this on.
I hope this was helpful.
Peter A Aldea, MD, FACS