Blott Kerr-Wilson’s brilliant career has been bookended by bathrooms in this magazine. The first, a deep-sea grotto she made in her London council house, won a competition in WoI in the 1990s, setting her on her life’s course as a sheller extraordinaire. Now, living in Norfolk, she’s created a new conch-clad wonder. Damian Thompson washes up| The World Of Interiors