For justice to work, it has to be seen to be done.
There will be ex-Post Office execs, Fujitsu employees and perhaps even some of their lawyers who know they are going to receive criminal charges.
Remember, this was a sustained campaign of persecution, corruption and lying that went on for many years, approaching two decades. Demanding money with menaces, conspiracy to pervert justice and perjury will be the least of the charges. There was no accident about it.
I think the Met will be finalising their list of interviewees (under caution) and will act soon after the General Election. We might expect there to be dramatic dawn arrests to make a point. The public demand it.