Amazing what you can find on the internet, if you look.
Basic salary for officers:
http://www.army.mod.uk/servingsoldie...ficers_pay.htm
Unless something wacky happens, you'll be in the OF1 range (Off Cdt to Fg Off) from the day you join until beyond your wings point.
Flying pay:
http://www.army.mod.uk/linkedfiles/s...c_pay_2007.pdf
Flying pay doesn't kick in for some time and then increases incrementally over a long timescale. You'll start on nothing and at best be on lower rate when you get wings.
If you're in it for the money become an airline pilot, a city-boy or a plumber instead.
Do you have your joining instructions for Valley yet? You might be passing out of Shawbury or Cranwell instead or even...