Hi Ollie

Well, it's a positive point that your derm took the time to look at you properly - god knows that happens rarely enough

The reason he might not like UVB on your face, is that it can be harmful to your eyes (hence the dark goggles you have to wear when you go for hospital UVB treatment) - other than that

Sunshine contains both UVA and UVB, and you get that on your face..... (OK, this summer, not very often

)
I agree with the others on the Elocon, it's pretty strong stuff. Not the very strongest you can get, but strong all the same. I was also advised not to use it on the face, and not to use it for longre than two weeks.
Definitely only one application a day.
You can read up a bit on Elocon here:
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LoginOn this page, in more normal english

, it says amongst others:
Only use Elocon on the face if your doctor tells you. If improvement does not occur within one week, tell your doctor.
So be careful, OK?

Take care, let us know how it goes

Des