Jake, thats a shame mate,keep hold of your license for the time being, you just dont know how the future will pan out. let it run to expiry date.
As for your gun, well if you sure you dont want it then selling it is probably the best option, especially if your not sure about where you will be living.
I think I know the shoot your on about, and yes its a shame, but as I have said before, there are plenty of other places to shoot round by you.
All the best and throw away your SGC, a lot of people work very hard for us to keep our right to shoot.