I think a hybrid of the predictions by @CaveMum and @givethatbabyaname will come to pass.
Ultimately it will not be that PA sees the inside of Belmarsh, but he will be surgically removed from the post HMQ monarchy.
If GM stays alive long enough for sentencing that's when the real shit should hit the fan. This was never a PA/JE/GM vacuum, there is a fucktonne of money and the ability that brings to exploit and cover up in equal measure that supported this global trafficking operation.
Just because it involved private jets, actual islands, property in the worlds most expensive cities, billionaires, politicians, CEO's, the BRF, tycoons offspring doesn't make it any different to trafficking 14 year olds from Ukraine to work in grubby nail bars and massage parlours fronting as brothels.
PA is the man stupid enough to have been photographed, but he's a small fry distraction to the people I'm certain are really bollocks deep in this despicable enterprise. Let's try two ex US Presidents and one of the most famous CEO of the world for starters.