I have moved into a house with a "modern" toilet. The porcelain encloses the
sides giving no side access to the nuts attaching the seat. The pan is too
close to the rear wall to allow me to get in even by bending my arm
somewhere between the wrist and elbow. (!) The seat needs replacing. Are
there tools available to do this? Do I have to remove the pan?

Advice please.

--
Martin