Re the ' reasonable doubt' that is why any items relevant will be seized. There are cases where a biker has triggered a speed camera but there's no vrm. If the prosecution can prove enough identifying points especially down to unique marks/scratches, scuffs etc on the bike or gear it will usually be enough! Of course it has to be in this country to constitute an offence so you could always do your vids round parts of Sheffield which tend to resemble Kazakhstan on a cloudy day.....you could dress your mother in law in a floral skirt, shawl and fetching headscarf and have her waving at your antics for added authenticity..... Sorted
Having spent many hours in Sheffield hospitals with the eldest I don't see anything there to make me think it was Kazakhstan and not Sheffield