<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by ozstamps:
Also on UK taxes it has been posted here before that Biz and First pax pay much higher tax rate than coach on same carrier, same flight. No idea if that is correct, but nothing would surprise me these days. 
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This is incorrect. Where these is more than one class on a plane, then the lowest class pays a lower tax than any of the other classes. As Concorde is only a one class plane, seat attract the lower rate of tax only.