just my opinion:
you appear to be over the initial limits for astigmatism, however if you phoned the CAA and asked them about the "deviation route" they might be able to help you. Make sure you have your prescription handy.
Also, considering you are quite young and have plans on serving in the armed forces for a while, you might be able to obtain a normal Class 1 in the future when regulations change.
Have a look at this
and perhaps this
too. Best of luck