As the title suggests, I have a 30" tub in a 32" tub opening. When the tub is centered, there is an inevitable 2" gap between the tub skirt and the existing floor tiles. The 2" gap excludes the 3/8" end grout line, which used to butt against the old tub. The existing tiles are laid on top of another layer of (old) tiles, thereby raising the tiled part of the floor by about an 1".
What are the possible lasting, preferably the least time consuming, ways to close this gap?