I've emailed spexmaniac too and await their reply. I'll adjust the frame
myself. I quite often have to do that anyway after my young nephew's
been jumping on my face!

Frankly the benefits of an optician I can actually visit haven't been
good value to me, or even much use. The last time I bought glasses I
wanted Transitions lenses. The thin ones were made of polycarbonate
which I couldn't read very well with due to chromatic aberration. None
of the staff at my optician's seemed to have ever heard of anyone
suffering this, nor did another I consulted, but it seems quite a well
known problem in this group. The only other choice in Transitions was
1.5 index, then I had a new problem: the thick lenses meant the
nose-pieces had to be bent further away from them, into the middle of
the frame, so although it had been OK with the dummy lenses and even the
thin prescription ones, it just didn't fit right any more.  Even then
the optician didn't bother measuring bridges on potential replacement
frames, I just made sure I picked the one that felt most comfortable,
and luckily it turned out to look good.