I think the below article might give some clues as to why the Belgium team GPR Racing aren't entering the Spa 24H (I haven't read anything about the below until I found the article, so apologies if it has already been discussed).
http://www.dailymail.co.uk/news/arti...eat-truck.html
Giuseppe Sperlinga, the boss of GPR Racing has been jailed for 15 years after admitting to two charges of drug smuggling.