I will, Zorro21, and yes the 50 tips were helpful, as was the page I found on the Norland Nanny website, stating in point 10 that a Norland Nanny will 'respect the central and enduring role of families in a child's life'.
NotSpaghetti, I am as firm with the grandchildren as my DD & SIL are. I don't think that's the issue.
What all this has made me realise, however, is that I was possibly sometimes less than kind in dealing with my own parents & parents-in-law in relation to my children when they were young. With the hindsight gained through becoming a grandparent myself, I would have given them the benefit of the doubt more often when I felt they spoke out of turn. It's like that excellent saying: 'Life can only be understood backwards, but it unfortunately it has to be lived forwards'. How true that is.