when you have one of these jobs, are you expected to basically be 'the parent' as in there 24/7 ...what happens when the child is in bed ? i cannot imagine the likes of the byonce or the beckhams then sit watching tv and attend to their child if it wakes and needs a drink or to go to loo ?
This is dependant on the job.
Generally speaking, there is a native Nanny (or Filipino/Indonesian/Chinese) who works either in rota with the English Nanny/Governess, or sometimes just 24/7.
Every* VIP role that I've had has been like this, usually a far lower paid (sadly) international Nanny is there for the night shifts and/or dirty work.
My new role (part the reason I've been AWOL so long is all the moving faff) is for a very very VIP family and has me for just 40 hours a week (3 afternoons and weekends) and a Russian Nanny from 9 to 9 two days a week, and mornings the other 3 week days. ie. The parents have the child by themselves overnight. This is unusual though.
I am very close to the Nanny of an extremely famous Olympian, and they have an international nanny for overnights.
Several of the Spice Girls do too.
The Beckhams I can't remember their set up (but David is soooooo lovely, the nicest man! 
), off the top of my head Stella McCartney does nights herself (but it's been several years since I was connected to her so I can't really remember).
Have you ever had a job were you expected to finish in the evening and the parents just weren't around ? were travelling etc and you were left literally holding the baby ?
Yes, all the time. My current family are excellent, but the general rule is to NEVER plan anything for yourself EVER as a Nanny, as you will inevitably be late, if you haven't had to cancel it.
Do you know anyone whose ever nannied for Angelina Jolie’s children? Yes. But I don't know much and am not allowed to say what I do know, I'm sorry!
As someone who has children with somewhat unusual names, have you ever cares for children with names that you find embarrasing to call? Sadly, yes. But we're talking really really unusual names, the kind that are bordering on cruel. Some of them were trult awful when coupled with the surname, unfortunately I can't share though - just trust me, they were bad .
Do you think you could ever just work in a normal, small house after so much luxury? I would happily have traded in almost all my jobs (bar the one I have now I think) for a normal family. Problem is, there are far far more jobs with nutters than normal people, so at least these ones pay well .
OP, any chance you could dish more nanny dirt? Any horror stories?
I can't remember what I've said and haven't said now. I had to get one of my male bosses arrested once, for child abuse.
I've seen so much cocaine etc in people's houses its unreal.
Most of the "dirt" is just about how horrendously people treat their staff. There was one (VVIP) family in the Middle East who encouraged their kids to wipe their noses on the staff. Same family would give the toddlers fistfuls of precious jewels to play with as party favour type things. The palace was full to the brim of hampers of expensive food that would never be eaten, huge huge baskets of fruit, gift hampers full of chocolate and caviar and God knows what - yet the Filipinos house staff were only permitted the cheap, unbranded food and often just ate leftovers when they had time during their 24/6 shifts.