NHS has a 3 tier banded pricing structure. You are having Tier 3 treatment which is the highest band.
Your new top teeth should be matched to the natural colour of your bottom teeth - which they would be after a routine polish. This is usually included in the £26-ish, 6-monthly routine check up, scale & polish.
No one naturally has bright white teeth AFAIK.
Thanks.
Once he explained that I can't have it done on NHS I told him "I am willing to pay, I just need to know that, for £100, its going to work".
He told me to wait until this course of treatment is finished and we will discuss it.
So I am no wiser.