All valid points in the previous replies.
I would add this , don't ham string your applications or renewals by boxing in your reasons for each gun.
The o/u will be for hunting, vermin control and clay pigeon shooting.
The semi auto will be for hunting, vermin control and clay pigeon shooting.
Both serve the same purpose but each in thier own right is more suitable for specific tasks. The o/u is more suitable to rough shooting etc etc and clay pigeons, while the semi is good for hide work and vermin.
If your Super is tricky don't give him a rope or stick to tie you down then beat you with.
Ref the land owners permission, a letter from your Club Secretary will suffice. If your club doesn't operate a membership number use your NARGC member number in lieu. If the Gaurds look for a PULSE number tell them that a gun club doesn't have one. This request by the Guards for a club PULSE number has become more and more common in the last few years. 99.9% of the time when its explained to them the don't pursue it.
Until you, yourself, are asked for the 'land owners permission I would ignore it. Do get a letter of membership and enclose it with your paperwork. By rights the Gaurds should accept a copy of your NARGC Compensation Membership Card as proof of club membership but it is both my own experince and my role on the club committee that has shown it not to be the case.
Best of look with your app ..
PS I to have a o/u and semi shotgun and use them as above.