I agree with
@helensaramay, it's a lottery within CCGs too. I'm not under a DSN, but spoke to one who said they've run out of the limited spaces for one. Luckily I've got a pragmatic GP who prescribed one to me, although he said me might get in trouble! Plus, my pharmacy are having trouble getting it, so might not work out in the end.
One day we'll all look back and wonder how people got by on finger tests, but we'll get there in the end I reckon.