[Guinness]

I can answer the first point..

Family/civil court can make decisions on 'balance of probabilities' regarding guilt, which is what the judge has done here...Criminal court i.e. the CPS need to find enough evidence that a jury will find 'reasonable to believe' guilt.

Civil court - 'chances are he did it' - judge makes ruling
Criminal court - 'here's the DNA, the fingerprints and the loaded weapon' - random 12 people with random intelligence levels have a chat about it and decide - judge makes ruling