I wrote:My vote for Granny would be Shirley Stelfox.
For Granny I'd go with a Keeping Up Appearances theme and cast Patricia Routledge. Everyone thinks of her as Hyacinth Bucket, but she has far greater range than that.
I've done it again and mistyped what I meant in a "casting call" thread. I meant Patricia Routledge for Nanny.
*Wanders off, chuntering to himself like Muttley*