1. Does anyone know, roughly what sort of delay I can expect from the time the flight arrives, to the time she comes through into the arrivals hall?
--No, no delay, base in my experience, I arrive early than the time expected
2. Once we are home, do we have to inform or report to anyone, about her arrival?
--- If youre saying UKBA or immigration, no!! just report to her family, they arrived safely
3. what are her limitations, legally, when she is here? I
f that with regards to work, she can work instantly but I guess still not allowed from some public funds
4. Is there anything else we have to do or complete, or is the next stage the ILR, 24 months down the road?
Yup, after 2 years, long way to go
5. We married in the Philippines, does this have to be reported or notified anywhere?
No need, as far as UK law, marrying in the Philippines are acceptable here in the UK, unlike if we get maaried here in the UK, we need to notify our Philippine embassy
6. is she and her 2 kids entitled to register with our local GP?
I guess, yes
7. She has family in Finland. Does anyone know the implications, visa wise, with us going there as a visit? e.g. does her spouse visa allow further travel?
Yes her visa allow to travel anywhere else, but you have to apply schengen visa for them if Finland is one of EURO countries,