Interesting. Obviously L band is going to be line of sight, so the jammer would need to be airborne to cover that area. Maybe worth checking ADSB data on the day to see if any aircraft are “loitering”.
What’s the A2 licence? I did the stupid online thing for my DJI Mini, but didn’t look at licencing beyond that. I must admit, it kind of upsets me that you need one. I used to build and fly balsa RC aircraft as a kid, and now that’d be illegal without paying for a licence. Progress, I suppose.