"An offence of Common Assault is committed when a person either assaults another person or commits a battery.
An assault is committed when a person intentionally or recklessly causes another to apprehend the immediate infliction of unlawful force.
A battery is committed when a person intentionally and recklessly applies unlawful force to another."
I cannot see how you can be charged with assault...you did not intentionally or recklessly hurt your partner...it was an accident.
How on earth did the police become involved?
Surely your partner explained and didn't report an assault?
Do ring the helpline, this sounds ridiculous!
I cannot believe that a barrister has become involved in this and is taking your money.