Whether you call them caskets, ossuaries or even sarcophagi - the coffin is usually a grave purchase - unless you go to Nottingham*s Vic Fearn and Company, coffin makers extraordinaire who pride themselves on putting the fun into funerals. London correspondent Jane Hutcheon checks up on how some of the locals are planning to check out. She finds anything goes, from giant pink ballet slippers to solid wooden eggs. They are art works destined for a very limited display.