“Those signs the use of which in commerce may constitute an impediment to the rights of third parties, may likewise not be registered as trademarks, in particular where:
e) [they] consist of a sign that is capable of affecting the identity or prestige of legal entities, whether non-profit or not, or natural persons other than the applicant or identifiable by the general public as being such a different person, particularly in regard to a given name, family name, signature, title, nickname, pseudonym, image, portrait, or caricature, where no consent has been obtained from that person or, if deceased, the declared heirs of that person ...”
On this basis, the opposition succeeded. The sign applied for and the name in conflict were confusingly similar, since the inclusion of an exclamation mark at the end of the sign was not sufficient to make it distinctive and any consumer could be confused as to the origin of the goods, due to the evident association with the band. Moerover, use of the mark PINKFLOYD! for the goods covered by the application in Class 31 would affect the identity and prestige of Pink Floyd (1987).
Source: "Pink Floyd successfully defends name without prior trademark registration" by Laura Michelsen and Andrés Medina (Triana Uribe & Michelsen, Bogotá), written for World Trademark Review, 10 June 2014
"The Happiest Days of Our Lives", here