I've contacted Cathway Pacific in regards to my D in Maths. I doubt I'll get a look in but its worth a try. I'm not even bad at maths, was just going through a rough patch when I did my GCSEs'. If I'm able to do the basic preliminary tests I don't see the problem.
Been using MS flight simulator and got all the way to commercial pilot so far. It's easy if you knuckle down and work hard.