Don't bank on commonsense
It looks like the option the DfT wish to go for is option 3 in the consultation. This is very bad news. All aircraft regardless of use will have to be screened over 15 tonnes. The worse bit though is the implication that all aviation, including light aircraft, will be subject to alternative security measures. That is very vague but could imply a whole raft of measures that small operations, aerodromes, etc. will find very awkward to comply with.
Don't for one minute assume commonsense will prevail. The industry at large has a very small window indeed to shout loud and try to stop the DfT having it their way.
It has all the potential of being an absalute nightmare for 'private' business aviation in particular.