They might have taken extra fuel, but knowing MAD/ATCO they probably did not facilitate their arrival and maybe could have been overwhelmed? I would imaginge that VLC is an alternate as, maybe VLL or even ZAG. But, who knows, I was not there and am sure the lads from FR are more than capable. That 4 A/C found themselves in this situation is, because 4 A/C FR where flying into MAD that day and unfornuately found themselves with the WX not collaborating. The metar had 30-40 prob. which, would indicate that they did/should/could have taken that extra fuel. That these flights ended up in an emercency overhead their alternate is due to a sequence of factors. Once again, I am sure the SAIRīs/captains report and the subsequent investigation will reveal what actualy happened.