Legal history could be made in a wrangle which is putting spots before the eyes of intellectual property lawyers and which could potentially knock the bottom out of the lucrative market of conceptual art. Damien Hirst is suing British Airways, claiming it based its spotted billboard advert for its low cost airline Go on one of his spot paintings. Meanwhile, restaurateur Marco Pierre White is accusing Hirst of plagiarising a dot painting which he made to decorate his Soho restaurant, Quo Vadis.