It would be helpful to have some info on here as to how the cops dealt with you if you were in an accident and riding without a front hand brake.

I think it's important to phrase it this way to the cops/solicitors: "front hand brake".
It is my understanding that your drive train is a back brake and thus it is legal to ride with only one hand brake.

My only tip here is to keep insisting that you "ARE NOT RIDING BRAKELESS". You are, perhaps, only riding with one drive-train powered back brake.
If someone ever gets the chance to use this, please come back on here and report how it went over.