First, you'll need to know that there could be two completely alternative types of mange and mange mites: First, you'll need to know that there were two completely alternative types of mange mites or ear mites:
1.) Sarcoptic mange and mange mites: Highly contagious, and is By and large passed from one animal to another. Although she doesn't appear to have this type.
2.) Demodex (or Demodectic) mange and mange mites: Not contagious with the help of physical contact, this form is genetic based, and is as a rule passed down from parent to pup.

The manifestations of mange mites or ear mites include: redness, flaky skin, chronic itching or biting, etc… and scabbing in the red/flaky areas. It usually begins on the face region (in my experience anyway), but will appear in other places. As far as solution in the UK, I'm not sure if it's any different, as I live in the US.

To diagnose mange and mange mites, a pet doctor will need to do a skin scraping of the effected areas to look for the mange and mange mites mite. Keep in mind that Demodex is On the whole more challenging to see. Has your vetrinarian done any skin scrapings to determine that this IS Mange?

Also, Demodex may be reverse itself. A Demodex flare is due to by something impairing the immune system. This can be a excellent change in food, a new allergy, an illness (even a small “cold" can cause it), stress, etc… If it IS Demodex and you may be find the trigger, you may be often help the Mange with little or no drugs involved by simply removing the trigger. Demodex flares can happen at any time during a pet's life, and will happen at any time that the immune system is impaired.

This could also be a case of allergies, a thyroid issue, etc… Did you change foods before this happened? Have you noticed any fleas? Have you recently moved to a new area? Has anything changed that could trigger an allergic reaction?

Your vetrinarian will well be doing the best that he will. If you're not happy with the remedy your pet is receiving, find a new vetrinarian. Finding a vet that you like, etc… will take time, and you may end up going via a outstanding number of various Vets.