I am so pleased

!
After all the anticipation (panic), I can confirm everything changed over smoothly today without a glitch - well almost no glitch.
My Sky connection died at 2:45pm, but the new Plusnet router hadn't arrived yet. No problem, I have a Netgear D7000v2, and in fact my old Plusnet Hub One - which I was ready to use. I was on a call from 3pm, and the postman delivered my new Hub One router just as that started (weird he was so late, even weirder that PN left it so late to send out).
At 4pm, I try the line with my analogue phone - it's alive. 17070 reveals a different allocated number. 5pm txt from PN "you phone line is ready", and 17070 revealed my number had been ported. Great.
Plugged in router, no broadband service. Switched off. 7pm got a txt "your broadband service is ready". Fired up router again, internet is alive

.
I was worrying about Sky SoGEA, cabinet capacity, lost service, all the stuff that you wonder 'is it worth risking', but happily it seems to have migrated totally fine.
The sync seems a little different than my records indicate from the past: 76.34 dn / 20 up, but actuall speed/throughput seems good:
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Tony