Via Twitter it unfolds thus: The two women accused of fraud were Nigella's PAs and were apparently given free rein of a credit card, which they misused (hence the fraud charge).
Part of their defence, which the judge allowed to be made public today, is that their was a 'tacit agreement' that as long as they turned a blind eye to her daily drug use and conspired to keep it hidden from Saatchi, they could more or less do what they pleased.
Saatchi wrote an email which was read out in court today which refers to him believing the women's allegations, and refers to "you and Mimi being off your faces on drugs". Mimi is Nigella's 19 year old daughter from her first marriage.
These women have been with Nigella since long before her marriage to Saatchi, and one of her books is dedicated to them as being her "kitchen confidentials".