It's really good hours and I don't have to do any cleaning etc. which most au pairs have to. I said that it's really no problem for me to make the kids beds, put on some laundry etc.
How old are you? To be a nanny you generally need a certificate that you're physically and mentally healthy BUT it's in the end all up to the family who they want to hire. So I don't think anything is impossible.
If you want to come to London you're really, really welcome to stay here with me/us, I mean it. I could even take you to a little trip to good old sweden if you would like to!