Have I got necrosis or infection after a facelift after 11 days? (Photos)

Sorry to hear and see your predicament.  In the UK, your care may be expedited by consulting with your GP who can at least start you on a course of antibiotics to limit the redness, which you report is extending past the black border.  Rely on them to refer you to a PS, who is more qualified to "nurse" you through the wound healing aspects.  In the mean time, don't scratch (to avoid innoculating superficial skin bacteria into the wound), limit the application of Betadine, take your temperature, monitor for purulent drainage and push on.  Good luck.

Hello,
Thank you for your question. It looks like you have an area of compromised tissue. The lower line appears somewhat abnormal like someone drew on your skin while the incision line is much more of what is expected a few days out. It does not appear infected in these photos. You should ask your surgeon for their recommendations based on what they did. This will likely require local wound care but may heal without major deformity in this area.
I can’t say it enough if you don’t have a surgeon that is available for your questions before and after surgery don’t let them operate on you!! Many people go abroad for surgery for many reasons. Sometimes it’s cost and other times it’s to see a renowned surgeon. I see consultations from a distance and have patients fly in on occasion fir surgery. However there is always a follow up protocol in place. It maybe via FaceTime, Skype, etc but communication with your surgeon is a must! 
Sincerely 
Dr G