I also understand that given their circumstances of (i.e. being a full time carer) they could possibly ask for leniency on grounds of 'exceptional hardship'.
To go down this ground, would a letter from the care receiver be enough. Or would they need to provide additional documents such as proof of Attendance Allowance, bank statements etc
Would this need to be submitted in advance or could they just turn up to the hearing with their evidence?
Exceptional hardship is indeed the term, and that it is hardship to others carries more weight than hardship to the 'criminal'.
Anything to show that the hardship is genuine, they would probably be advised to take that evidence but only share it if questioned, they will be giving verbal evidence under oath (so no telling porkies) and usually a court won't ask for every element to be proven. No need for a suite, just clean and relatively smart to show they are taking it seriously, we aren't in the 1980's anymore!
No need to present anything in advance, the court is aiming to achieve Justice so while they will want to ask some pertinent questions no-one will set out to trip them up on admin type issues.