Humphrey. Forget the bikkies. I was asked, who else would have keys to your cabinet. In your case not relevant, but no-one else is to have knowledge of your key location, eg your partner unless guns are noted on a shared certificate / cabinet. Stability of home environment, children in the home and a check of home security / neighbours / relationships. I was asked about shooting on a cold morning and over water !. A slight trick, but frozen ground and water can cause a richochet - particularly with a non-frangible bullet like a 40gn .22LR round. I was also asked how I would securely transport my rifle from home to ground and security if I popped into a shop. Also - "how do I feel about loading a magazine at home in good light and to save time when you arrive" . Another slight bit of trickery !!. The carrying of a loaded magazine in your pocket on the way to your permission. A legal no, no. It's deemed a loaded weapon. (some people say no, but I err on the side of best practise)
My interviewing FEO also liked the fact I had a plain black ring binder (no camo or gun brand stickers / same with my car - no BASC or my other gun is a Browning sticker !!) with copies of BASC insurances, letters of permission with ICE numbers, some cheap vistaprint business cards with contact details on, attended ranges days, rounds shot and calibres, and OS maps of my perms with public access and no shoot zones marked. Liked the fact I shot on a range - particularly to test different ammunition at different ranges / establish drop charts / and had mentors.
All calm, pragmatic common sense stuff, properly conducted and no sloppy matey matey stuff but the FEO made me carefully consider my application in the interview.
Good luck.