D to A,
you have forgotten to add the duty pay.
210 x 20 = 4200
+ 3010
-----------
7210 Dms per month = approx 1050 sterling.
Not too bad without any rent, water, electricty, gas, transport costs to pay.
And this is without overtime ( payable after 110 duty hours per month, i think. Note DUTY hours, not FLIGHT hours )
Friends who fly out of London take home marginally more than this but then lose 500 pound+ immediately in rent.
Not too bad a package to be honest.....